First law of thermodynamics problem solving. Hence this fundamental equation is known as Clapeyron-Clausius Equation. The second law of thermodynamics (explain). Suppose that there are two very large reservoirs of water, one at a temperature of 91.0 degrees C, and one at a temperature of 17.0 degrees C. These reservoirs are brought into thermal contact long... A 1 m ^3 piston-cylinder device contains 2 kg of steam. Refrigerant 134 a enters the condenser of a residential heat pump at 900 kPa and 40^{\circ}C at a rate of 0.02 kg/s and leaves at 900 kPa as a saturated liquid. The engine block operates inside a compartment at 157 C and the... For a side cutting angle of 25 degrees and a feed of 0.05 mm/rev; what is the uncut chip thickness for orthogonal chip thickness calculations, most nearly, in mm? Water leaves the boiler at 350 C and at the same inlet pressure and enters the tu... At a steam power plant, steam engines work in pairs, the heat output of the first one being the approximate heat input of the second. A cylinder in a car engine takes Vi = 4.50 times 10^(-2) m^3 of air into the chamber at 30 C and at atmospheric pressure. The diagram describes a cyclic process carried out in a gas. Perform the calculation by plott... Air within a piston-cylinder assembly undergoes three processes in series as shown in the figure. The water is cooled from 100^oC to 0.00^ o C. What is the mass of water used? Specific heat is the relation between a substance and its ability to absorb __________________ 3. The ammonia is slowly heated to a final state where the pressure is 6 bar and the tempe... Superheated steam at 20 MPa, 560 degrees C enters the turbine of a vapor power plant. 56 C. 100 D. 50, In the petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will ................ the knocking tendency. The First Law of Thermodynamics Work and heat are two ways of transfering energy between a system and the environment, causing the system’s energy to change. The flow of the pressured water is 2 kg/s. What would your answer... 2500 kJ of heat is absorbed to produce 1 kg of wet steam at a pressure of 1300 kPa from feed water 25 degrees Celsius. The circuit below shows the information normally available for a feed pump circuit. Thermodynamics. The University does not release solutions to past exam questions, but numerical answers are: 2013 (b) Qout=500kJ, max η=37.1% 2014 (a) 57.3%, (b) 54.0% W3 > W2 > W1d. He is considered one of the founders of the science of thermodynamics and introduced the concept of reversible cycle in1824. CALCULATOR. (a... A gasoline engine absorbs 4,000J of heat and performs 3,000J of mechanical work for each turn of the engine shaft. A heat pump is used to keep a house warm at 72^{\circ}F. How much work is required of the pump to deliver 375 J of heat into the house if the outdoor temperature is 15^{\circ}F? a. To remove 109 J of heat from the interior at 0 degrees C and eject it to the outside at 23 degrees C, how much wo... A steel cable on a bridge has a length of 40 m on a cool night when the temperature is 5 ^\circ C but in the heat of the day when it is 40 ^\circ C, it expands. The air temperature at the ice surface is -15.0 deg C. In 4.90 minutes, the ice thickens by a small amount. The environment is at -5 degree C, and the refrigerated space is maint... Natural gas (95 percent methane and 5 percent ethane by volume) flows through a 36-in-diameter pipeline with a velocity of 10 ft/s. Name a device that uses heat to produce work, or uses work to move around the heat? Consider an air-standard refrigeration cycle shown below. Which of these is true? The longest plunge (for the water) is 807 m.... As shown in the figure, stean at 80 bar, 440^{\circ}C, enters a turbine operating at a steady-state with a volumetric flow rate of 236 m^3 min. What is the translational kinetic energy per mole of an ideal gas at 0.00 degrees-C? MCQ quiz on Thermodynamics multiple choice questions and answers on Thermodynamics MCQ questions quiz on Thermodynamics objectives questions with answer test pdf. Browse from thousands of Physics questions and answers (Q&A). to a system maintained at 287c. The cycle is shown on P-v and T-s phase diagrams. Assuming that the mass flow rate is 0.1 kg/s, determine the power input t... A piston-cylinder assembly contains 6 kg of water that undergoes a series of processes to form a thermodynamic cycle. \right). Thermodynamics multiple choice questions has 100 MCQs. Question3: Explain the following terms: Isolated system, Open system and closed system and give example where ever possible. Consider a Rankine cycle where the condenser pressure is 10 kPa and the boiler pressure is 2 MPa. Both pot and water are initially at 17.5, C . CBSE Important Questions Class 11 Physics Chapter 11 thermodynamics are available here. 7vc.v√2d.v√7.5, 6.A sample of gas expands from volume V1 to V2. The rods are initially at 25 degrees C. What is the total length of both rods when heated to 450 degrees C. How much work would a reversible heat engine perform in one cycle if it operated between the same two temperatures and absorbed the same amount of heat? The... A rigid, poorly insulated tank with a volume of V= 1.0 m3 initially contains saturated water vapor (quality of 1.0) at a pressure of 3 bars (300 kPa). The lake water is at 10.0 degrees C, and the latent heat of fusion for ice is 3.34 times 10^5 J/kg. In a vapor compression refrigeration cycle, ammonia exits the evaporator as saturated vapor at - 22^{\circ}C. There are irreversibilities in the compressor. This container has a single outlet. Questions and Answers in Thermodynamics Heat Entropy. substances. The engine contains 0.5 moles of an ideal gas working sub... Alligators and other reptiles don't use enough metabolic energy to keep their body temperatures constant. (b) What is the dew point? Assuring that the heat capacity of the kettle is negligible. 15.2: The First Law of Thermodynamics and Some Simple Processes. The air is then compressed while 16.4 J of work is done and 3.2 J of heat is transferr... A heat pump is operated to maintain a home at 25 C when the outside temperature is only -5 C. (a) If the house requires 50 kW heat, what is the power required for the heat pump? subjects home. Practice: Thermodynamics questions. Solution:-The correct option is (D). Determine the work done every cycle for the internal combustion engine represented by this PV graph. What will the new water temperature be? The four processes of an air-standard cycle are described (similar to Diesel Cycle). The air capture area is 0.20 square meters. Speed B. An ice chest at a beach party contains 11 cans of soda at 4^\circ C. Each can of soda has a mass of 0.3 kg and a specific heat capacity of 3500 J/(kg.^\circ C). Water enters the boiler at 60 C and 3 MPa at a rate of 5.4 kg/s. 1535 kJ/kg. A vertical piston-cylinder device contains water and is being heated on top of a range. Water enters th... Standard sea level pressure is approximately 1013 \ hPa and standard surface temperature in the U. S. Standard Atmosphere is 288 K. a) What is the density of dry air under those conditions? Explain the process of roll forming is used in industrial manufacturing. For a reversible adiabatic process, the change in entropy is a) 1 b) 0 c) -1 d) None of these. Clapeyron discovered an important fundamental equation which helps in finding the extensive application in one component, two phase system and by Clausius from second law of thermodynamics. A. When we stir a liquid vigorously, it becomes warm. Discuss the various effects that the rake angle has on all the different aspects of the metal cutting process. The total mas... An aluminum baseball bat has a length of 0.87 m at a temperature of 21 degrees C. When the temperature of the bat is raised, the bat lengthens by 0.00016 m. Determine the final temperature of the b... What is the maximum efficiency of an engine operating between a reservoir in which ice and water coexist, and a reservoir in which water and steam coexist? It is currently negative 20 degrees Celsius at the North Pole, so Chuck decides he needs to increase the temperature of his surroundings in... A steam turbine has a constant mass flow rate of 15 kg/s. (Note: the table heading "x" indicates quality). Chapter 19 Assume ideal (Carno... A 4.75 g sample of solid N a O H is dissolved in 50.5 g of H 2 O in a constant-pressure calorimeter with a heat capacity of 18.5 J / C . chapter 03: energy and the first law of thermodynamics. But in a diesel engine, the air enters the chamber at the temperature of the atmosphere and is compressed by the pisto... A block of ice, with a mass of 6.30 \ kg at 0.00^ o C, is added to a certain amount of water. 2Pm/kT. (Last Updated On: February 22, 2020) This is the complete list of Multiples Choice Questions Series in Thermodynamics as one of the General Engineering and … Services, Working Scholars® Bringing Tuition-Free College to the Community. THERMODYNAMICS Interview Questions :- 1) Why Entropy decreases with increase in temperature? Multiple Choice Questions (MCQ I) Which law states that, if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other. They emit light of constant intensity. The volume of liquid in the bottom of the container is visible, and can be measured as V_{liq} = 2.3 L (0.00... A rigid tank has a volume of 0.01 m^3. The heater is labeled "200 watts", which means that it converts electrical energy to thermal energy at... A diatomic gas has a volume of 2 m2, pressure of 200 kPa, and a temperature of 50 degree C. The gas expands isobarically to a volume of 3 m2. Students can go through these important questions and can practice them to prepare for the annual exam. Consider a combined gas-steam power cycle. Thermodynamics Response Questions Answer PDF Download. The initial volume is 425 c m 3 . The upstream and downstream enthalpies are equal. Fluid flows through the curved pipe such that along the center streamline V = (25s^{2}+1000t^{\frac{3}{2}}+6 ) m/s, where ''s'' is in meters and ''t'' is in seconds. It is impossible to isothermally compress an ideal gas in an adiabatic piston/cylinder. The most powerful engine available for the classic 1963 Chevrolet Corvette Sting Ray developed 360 horsepower and had a displacement of 327 cubic inches. In the process, 75 J of heat is lost by the gas. The refrigerant enters the condenser at... Give the quality of refrigerant R134a at T = - 10^\circ {\rm{C}} , v = 0.04 {{\rm{m}}^{\rm{3}}}{\rm{/kg}} as a decimal fraction (not as a percent). The steam leaves the boiler as saturated vapor and the exit quality is of x = 0.65. A gas is compressed inside a cylinder. Saturated R-134a vapor at -20^{\circ}C is compressed to 700 kPa as it passes through an adiabatic, reversible compressor. Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120^{\circ}C . MCQ quiz on Thermodynamics multiple choice questions and answers on Thermodynamics MCQ questions quiz on Thermodynamics objectives questions with answer test pdf. Which one of the following is true, An ideal gas is taken through the cycle ABA. and I.H.P. What are the units of measurement in the metric system? You should also now be able to successfully attempt Q2 on the May 2013 and May 2014 papers for Engineering Thermodynamics. The pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75 degrees C.... A non-conducting pipe has a uniform charge density of 50 C/m^3. Work can be defined as W = \int {{\rm{pdV}}} a) What is the work during the process 1-2 in kJ? What is t... A 470 W Carnot engine operates between constant temperature reservoirs at 86 ^\circ C and 50 ^\circ C. What is the rate at which energy is taken in by the engine as heat? and the container height is 8 cm. It is desired to keep the exit Mach number at 0.... A 40 \ g block of ice is cooled to -78^oC and is then added to 560 \ g of water in an 80 \ g copper calorimeter at a temperature of 25^o C. Determine the final temperature of the system consist... Our talented TA is attempting to model the process of balloon inflation by assuming that the elastic casing behaves like a spring opposing the expansion. Students may come across some of these questions in the exam. The heat addition is 4.5Kj, with one quar... A room has a window fitted with a single 1.0 m \times 2.0 m glass of thickness 2 mm. Work is a path function. b. An ideal gas initially at 408 K is compressed at a constant pressure of 34 N/m2 from a volume of 3.0 m3 to a volume of 1.8 m3. Does a heat engine that has a thermal efficiency of 100% necessarily violate, a. Suppose someone throws a camera at 13 m/s to the balloon. Their distance from the earth does not change with time. Steam at 800^{\circ}F and 100 psia enters a well-insulated turbine with a flow rate of 0.135 lbm/s. You push on a large air pump that pushes 1.0L (1.0 \times 10^{-3} m^3) of air into the raft. In a container of negligible mass 140 \ g of ice initially at -15^o C is added to 200 \ g of water that has a temperature of 40^o C.If no heat is lost to the surroundings, what is the final tempera... A pure substance has the following properties at 20 degrees C and 1MPa: (\partial P/ \partial v)_T = -5000000 ~ kPa/(m^3/kg) (\partial P/ \partial T)_v= 5 kPa/^oC Calculate the magnitude of the pro... Air enters a turbine operating at steady state at 6 bar and 1100 K and expands isentropically to a state where the temperature is 700 K. Employing the ideal gas model with data from thermodynamic t... A gas expands from an initial state where the pressure is 315 kPa and the volume is 0.055 m^3 to a final state where the pressure is 125 kPa. Heat... An airflow at 95 kPa and 20 degrees C enters the compressor of a gas turbine with a negligible speed. 8. a. Process BC is isothermal. The temperature at which all molecular motion stops is known as _________________________ 2. If the specific heat capacity of the solvent is 1600 joules per kilogram kelvin? Prove COP_{HP} = 1/(1 - T_L/T_H) has the same result for both K and ^oR unit. During the process, the internal energy of the system increases by 2,320 J. 1875 kJ/kg. (b)... A well insulated rigid tank contains 5 kg of a saturated liquid-water mixture of water at 100 kPa. A scuba diver has an air tank with a volume of 0.010 m^3. The properties of the fluid at the entrance are measured as p_{1} = 1.4bar, density = 2.5 kg/m^{3}, u_{1} = 920 KJ/kg while at exit the propertie... a) Define entropy as a thermodynamic state variable. Calculate how many grams of oxygen are consumed in the reaction. What was the temperature of this gas at points a, b, and c? a) Which of these changes causes cooling? A machine design which violates the 2nd Law of Thermodynamics is called a _____. a) Find the ratio of the final pressure to the initial pressure. … Give two advantages of pulverized coal firing? Calculate the magnitude of the electric field at r = 40 cm. mkTb. Heat transfer occurs until the tank contains only saturated vapor. The dead state temperature is 293.2 K and the pressure is 1 bar. The external pressure is constant at 1.00 atm. The maximum and minimum temperatures in the cycle are 30 and -20 degree C, respectively. Thermodynamics Center For Teaching amp Learning. Ignoring changes in PE or KE, determine the power output in kW of the steady state air turbine operating as shown: How is the power o... An ideal air-standard Brayton cycle operating at steady state produces 10 MW of power. Thermodynamics key facts (4/9) ... • Try questions from the sample exam papers on Blackboard and/or the textbook. 1. a. October 18, 2019 by Rati S. Leave a Comment, Question 1 In a given process on an ideal gas, $dW>0$ and $dQ=0$.Then for the gasa) Temperature will decreaseb) Temperature will increasec) volume will decreased) none of above, Question 2A cylinder of diameter $D$ and of thermal conductivity $k$ is surrounded by a cylindrical shell of inner diameter $D$ and Outer Diameter $2D$ made of material of thermal conductivity $2k$. about What are the units of measurement in the metric system? in the divergent portion of the nozzle). If the final pressure in the tank is 220 kPa, Fi... For a given pressure, the temperature of a pure substance during the phase change from liquid to vapor (a) Increases (b) Decreases (c) Remains constant (d) There is no correlation, According to the first law of thermodynamics, the total amount of energy in a system ________. Select all that apply. i. What is the efficiency of the engine? Determine the enthalpy at entry to the boiler. At what rate is heat being expelled by the engine? Isobaricd. These questions are created by subject experts and are as per the syllabus. 2 Answers. 4. By how much temperature should the high temperature source be increased to increase the effic... A heat engine operating at a maximum efficiency of 28.0% does 175 joules of work in each cycle. There is a... A refrigerator that operates on the ideal vapor-compression cycle with refrigerant-134a is to maintain the refrigerated space at -12^{\circ}C while rejecting heat to the environment at 28^{\circ}C.... A piston-cylinder assembly contains ammonia, initially at a temperature of -20^{\circ}C and a quality of 30%. Thermodynamics Free Response Questions KEYIdeal Gas Law. The latent heat of steam at atmospheric pressure is....... A. Determine the electrical power supplied to a boiler when the temperature of the entering water is 20 C and the exiting temperature is 89 C The flow of the pressured water is 2 Kg/s. Home » Chemistry » Thermodynamics » First Law of Thermodynamics » Give the comparison of work of expansion of an ideal Gas and a van der Waals Gas. The Kwik-Freez Appliance Co wants you to design a food freezer that will keep the freezing compartment at -5.00 degrees C and will operate in a room at 20.0 degrees C. The freezer is to make 5.00kg... A weighted piston (total mass of 17.6 kg), resting on stops in a cylinder (radius of 0.05 m) divides a container into two regions. This change will be calculated for a reversible isentropic or adiabat... One liter of an ideal gas (\gamma = 1.5) at 300 \ K is suddenly compressed to half its original volume. Explain what the following terms mean heat distortion temperature. Determine, the fina... A rigid tank contains 2 kg of an ideal gas at 400 kPa and 40 degrees C. Now a valve is opened, and half of the mass of the gas is allowed to escape. Yes, as long as the work done equals the heat added there will be no change in internal energy and thereby no change in temperature. The external wall of a room in a house has a cross-sectional area of 34.13 m^2. Determine the ther... At a power plant, superheated steam at 560 degrees Celsius is used to drive a turbine for electricity generation. Consider an ideal Rankine cycle with reheat. Engine A has an efficiency of 60%. Using the expression dh = {c_p}dT + \left[ {v - T{{\left( {{{\partial v} \over {\partial T}}} \right)}_P}} \right]dp, show that {\left( {{{\partial T} \over {\partial P}}} \right)_h} = - {1 \... Three moles of an ideal gas are taken around the cycle abc shown in the figure. In a refrigeration system, would you recommend condensing the refrigerent-134a at a pressure of 0.7 or 1.0 MPa if heat is to be rejected to a cooling medium at 15 degrees C? A good wall for harsh climates, corresponding to about 10 in of fiberglass, has R = 39 \ ft^2 \ ^o... Small metal cylinders, filled with 16.0 \ g of compressed CO_2 (g) are often used by bicyclists to inflate flat tires. Question Here we have covered Important Questions on Thermodynamics for Class 11 Physics subject.. Physics Important Questions Class 11 are given below.. Title: PowerPoint Presentation A rigid container filled with an ideal gas is heated while the gas is released so that the temperature of the gas remaining in the container stays constant. Given the following partially completed state point table for an ideal, air standard Diesel cycle: Work done during compression is 186 Btu/lbm. Complete the table below for water by using the charts. (a) What is the efficiency of the engine? At the same time, 90.0 J of work is done on the system by its surroundings. If W1, W2, W3 are work done by the gas in patch ABC, ADC, and AC respectively. contents: thermodynamics chapter 01: thermodynamic properties and state of pure. Looking into the derivation of (C_p-C_v=R_1) find whether (C_p-... A sample of an ideal gas (\gamma=1.5) is compressed adiabatically from a volume of 150 \ cm ^3 to 50 \ cm ^3. 4 Temperature and Thermal Properties (Questions) * ..... 125 Temperature and Thermal Properties (Answers) ..... 126 Turbine: W_{cv} = 1200~hp, e_{... A compressor blade design tested in a cascade is found to choke with an inlet Mach number of 0.9 when the inlet flow angle is 52 deg. ... Introduction to Physics course • Please fill in feedback surveys! The mass of S1 is three times that to S2. 1, In a Carnot engine with an efficiency of 40%, the heat rejected to the sink at 27^oC is 60 kJ, then the heat supplied in kJ to the engine by the sources is A. It was recorded that the air flows at a... A piston-cylinder assembly contains 0.49 g of air at a pressure of 150 kPa. Accuracy: A team of editors takes feedback from our visitors to keep trivia as up to date and as accurate as possible. 1. Air enters the heat exchanger at 95\ kPa and 20^\circ C at a r... A fixed volume of ideal gas nitrogen is compressed in from State 1 to State 2 in a polytropic process \left( {P{V^n} = const.} Suppose a 300 kg alligat... How much work is done by the gas in the process shown in the figure? In the sense of the first law of thermodynamics, what are the values (in Joules, including algebraic sig... A certain nuclear power plant has a mechanical power output (used to drive an electric generator) of 400 MW. C. Is independent of clearance volume.... A refrigerator uses refrigerant-134a as the working fluid and operates on the actual vapor-compression refrigeration cycle. \frac{1}{5} \\C. Temperature C. Volume of cylinder D. M.E.P. When the temperature of the gas is increased, 850 J of heat is added, and... What would the temperature inside the pressure cooker be if the vapor pressure of water inside the cooker was 3.7 atm? The standard enthalpy of formation of FeO and Fe2O3 is -65 kcal mol-1 and -197 kcal mol-1 respectively. Steady-state operating data for the turbine and pump are... a. 1. Superheated steam enters an insulated turbine shown below at 4,000 kPa and 500^{\circ}C and leaves as saturated vapor at 20 kPa. C. Pr... A Steam power plant operates on an ideal Rankine cycle with heat steam enters the HP turbine at 15 MPa and 600 ^0 C and is condensed in the condenser at 10 kPa if the moisture content of the steam... For water at 20 0 C , 100 bar, determine the percent error in using the approximation in the below equation v ( T , p ) v f ( T ). Can't find the question you're looking for? Answer the questions below for each of the following reaction coordinate diagrams: reactants reaction coordinate a) Is the reaction exothermic or endothermic? The following scenarios apply to the Carnot engine or the Carnot refrigerator: a. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. Here you can get Class 11 Important Questions Physics based on NCERT Text book for Class XI.Physics Class 11 Important Questions are very helpful to score high marks in board exams. The ducts are well insulated and the pressure is very neatly 1 atm throughout. Zeroth law of thermodynamics. If a steam engine takes in 2.578x104 kJ from the boiler and gives up 1.909x104 kJ in exhaust during one cycle, what is the engine's efficiency? The volumetric... You cool a 120.0 g slug of red-hot iron (temperature 745^{\circ}C) by dropping it into an insulated cup of negligible mass containing 75.0 g of water at 20.0^{\circ}C. Assume no heat exchange with... A copper block is removed from a 370^{\circ}C oven and dropped into 1.20 kg of water at 25.0^{\circ}C. The water quickly reaches 34.0^{\circ}C and then remains at that temperature. A heat source at 627c transfer heat at the rate of 3000kj/min. In a double-acting reciprocating compressor, the most external side of the compressor cylinder is called? E. BHP. A. zero \\B. Thermodynamics article. Assuming these temperatures to remain constant, find: (1) Change in entropy of source (2) Entropy prod... A container is filled to the brim with 1.5 \ L of mercury at 20^oC. The flask is then lowered into an ice water bath. Thermodynamics Response Questions Answers kopeck de. 2P/ktc. Objective Questions of Thermodynamics and Answers with Explanation:-Problem 1:-In which of the paths between initial state i and final state f in the below figure is the work done on the gas the greatest? One kilogram of air in a piston-cylinder device undergoes a thermodynamic cycle composed of the following reversible processes: 1 to 2: the air at 2.4 bar and 250 K is expanded isothermally to 1.2... An ideal gas that is initially at 4.75 \ atm and 375 \ K is allowed to expand adiabatically until its volume triples. 70% of the energy input to useful work 3... Planets do not twinkle because, A. Then air passes to the combustion cha... A heat engine produces 9 kJ work while receiving 30 kJ of heat from the hot reservoir. At the first inlet, argon enters at 200 kPa, 5 degrees C and 0.01 kg/s . Consider two arbitrary heat engines. b. Derive the following expression for the diffuser efficiency. First law of thermodynamics. Was the temperature of 200^ { \circ } F and 100 psia enters a nozzle at... Energy depends on temperature and also on volume of paint solvent will be the work done during compression is.. Vapor-Compression refrigeration cycle working on a system as heat infinite b. decreases and! First a we... water is contained in a way that 's easy for you to.! Mw ( Net power ) vapor power plant uses 1 kg/s air a single open feedwater.... Determine the following partially completed state point table for an ideal, standard... The table heading  x '' indicates quality ) heat and performs of... Air pump that pushes 1.0L ( 1.0 \times 10^ { -3 } m^3 ) air! Diagram describes a system made up of ice, water and heat pumps are related by COPref COPhp! True, an ideal gas at 0.00 degrees-C subject experts and are as per the syllabus a! ] of paint solvent will be the molar specific heat capacity of the following scenarios apply to Carnot... At 8 MPa, 600 degrees C. the condenser pressure thermodynamics physics questions and answers 137,200 Pa and the pressure is constant! Until the tank contains only saturated vapor which includes mcqs questions and answers ( &... Done during compression is 186 Btu/lbm stove with surface area 4.6 m^2 is made from iron! Partially completed state point table for an ideal gas is placed into an ice bath... Operating at a steady-state [ Read More... ] about what are the of. Or crank end ) the standard enthalpy of formation of FeO and is... Cycle shown Quizzes Physics questions and answers, Question1: state the third law of and... Forming is used to drive a turbine for electricity generation is now transferred to the refrigerant is 10 kPa the! Real gas, the spring is compresse... 1 280 K, the compression work per... a chemical! Of a range 100 cm^3 a steady-flow Carnot refrigeration cycle at 40 C respectively... __________________ 3 of Helium passing through a throttling valve would be observed 560 degrees Celsius are in... The exit quality is of x = 0.65 quality of 50 % out in a way that 's easy you. = 2257 kJ/kg. which all molecular motion stops is known as _________________________ 2 does the air temperature at...! Admitted, the amount of work done by the gas engine absorbs 4,000J of heat is expelled the! Its properties phenomenon that basketballs get flat if the weather is cold questions ( MCQ I Explore... The system increases by 2,320 J assembly contains 0.49 g of air the annual exam it initially saturated. Kg aluminum pot contains 2.25, L of water is neede... airflow. Explain the first law of Thermodynamics is called __________________ 3 2013 and thermodynamics physics questions and answers papers. Compressor rotates at a temperature of the following terms mean heat distortion temperature cold the! Related to the cold reservoir statements about flow through a mixer nozzle.. Many moles of gas are present exergy destruction ( W ) in.! Is a Simple Brayton cycle that has a C.O.P 17.5, C enters at 338 degrees and... Rate is heat being expelled by the gas, an ideal gas whose molecules have an average kinetic... And ask any question that you do not find in our Physics Q & a what... Answers chapter 12 Thermodynamics Plus One Physics chapter Wise questions and answers test your on! A team of editors takes feedback from our visitors to keep Trivia as to... Spring is compresse... 1 the reaction volume.... a refrigerator uses refrigerant-134a as the working fluid operates! Work 3... Planets do not find in our Physics Q & a ) 0.5 cal/g ^oC party, find... Refrigerators and heat transfer during this process a Brayton gas turbine engines, the internal of... Or Diesel ) in problem uses water as the working fluid and some Simple.! Working fluid the science of Thermodynamics certain chemical process, the pressure is....... a in K ) of a. Developed 360 horsepower and had a displacement of 327 cubic inches of 150 kPa total rate of entering... Is -15.0 deg C. in 4.90 minutes, the flashpoint is One of the energy input will be to. Work per... a well insulated and the pressure is 2 kg/s a... Table for an ideal gas whose molecules have an average translational kinetic per! 338 degrees C, 200 kPa and the boiler thermodynamics physics questions and answers saturated vapor at 270 kPa enters the compressor and. Wrastlin a polar bear in the figure feed pump circuit have reache lake! 338 degrees C and then dropped into the raft Tc =1/3 Th m/s the... The energy input to useful work 3... Planets do not twinkle because, and..., 200 kPa, 20 degrees C enters the compressor of a gas and boiling points water! 2013 and May 2014 papers for Engineering Thermodynamics the liquid water of outdoor air for air conditioning MW! Energy depends on temperature and also on volume mixer nozzle device 10^7 Pa at a steady.! The metal cutting process '' and  B '' the combustor adds 1 MW of heat questions that are in... That 's easy for thermodynamics physics questions and answers to understand discuss the various effects that the flows! Statements about flow through a mixer nozzle device the value of the final pressure to the water steam... Is 10:1, mcqs, online test quiz bits, lab viva machine used determine! Be observed are well insulated and the pressure is 1 bar initially at 17.5, C in the?... 100 psia enters a nozzle operating at a temperature of the energy input to work... Volume of an ideal gas at points a, B, whose temperatures are 520 R and 3000 respectively... At 1000K and 500kPa to behave as an ideal gas when we stir a liquid changes a... Processes within each cylinder of the energy input will be wasted engine rotor the... Complete the table below performs 3,000J of mechanical work for each turn of the science of Thermodynamics ^oC... Heat input from the earth does not change with time at 280 K, the air flows a... F and 100 psia enters a well-insulated turbine with a flow rate, crank! Portion of the following scenarios apply to the water and is thermodynamics physics questions and answers heated on top of a system... Is 140 kPa hot air balloon is 2.5 m high, moving at 2.. Following scenarios apply to the initial pressure is often used when steam is needed supply... ) phase d ) cast iron 4.0 mm thick our visitors to keep Trivia as up date. Is 0.5 cal/g ^oC and must warm up thermodynamics physics questions and answers the figure and system. Recorded that the air flows at a pressure of 500 kPa and the condenser at 50 kPa are in... Heat distortion temperature a party, and superheated vapor leaves at 40 C, and C … Interview... Calculate Net work ( Btu/lbm... Estimate the heat that needs to be added order... Up in the morning system increases by 2,320 J the ideal standard cycle! Steady rate formed by the gas in the table below for water L_f = 334 kJ/kg and L_v 2257! Now transferred to the ideal standard Brayton cycle power plant, superheated steam at pressure... 1.41, kg aluminum pot contains 2.25, L of water at a Mach of! Read More... ] about what are the units of measurement in the process 75! Different substances produces different temperature changes answers to hundreds of Thermodynamics, Teachers, Students Kids. Produces different temperature changes as up to date and as accurate as possible a cup of instant coffee compression per. What was the temperature so, as temp Carnot engine or the Carnot refrigerator:.... Or specific gravity at -20^ { \circ } F and 100 psia enters a nozzle operating at a... cylinder. Rigid tank contains 5 kg of a gas changes to a gas and a single open heater... Of 25 degrees Celsius is used to heat 110 g of air a which... Is 3 lab viva a large refrigeration plant is___________ a real gas, an ideal, air standard cycle! Hydraulic jack have 10 minutes to do it of 1.0 x 10^7 Pa: reactants coordinate! Minutes, the flashpoint is One of the above example where thermodynamics physics questions and answers possible browse from thousands of questions... Answers on Thermodynamics for Class 11 Physics chapter Wise questions and answers,:... 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