An insulated piston–cylinder device contains 0.018 m3 of saturated refrigerant-134a vapor at 0.6 MPa pressure. The refrigerant is now allowed to expand in a reversible manner until the pressure drops to 0.16 MPa. Determine the change in the exergy of the refrigerant during this process and the reversible work. Assume the surroundings to be at 25°C and 100 kPa.

Q: Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assume…

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Q: Two rigid tanks are connected by a valve. The left tank is filled with 8.6 ft of air initially at 22…

A: Given Pressure, PA = 22 psia               PB = 17.3 psia Volume, VA = 8.6 ft3               VB =…

Q: heats and neglect the changes in kinetic and potential energies. rmine the exit temperature of air…

A: Given data as per question P1=95 kPa, T1=27° C=300 KP2=600 kPa, T2=277°C=550 K

Q: A mass of 8 kg of helium undergoes a process from an initial state of 3.9 m³/kg and 15°C to a final…

A: Introduction The increase in usable work potential as the process moves from the beginning state to…

Q: Air is compressed in an adiabatic compressor from 75 psia and 660 R to 290 psia and 1320 R.…

A: Given   Initial pressure, P1 = 55 psia    Final pressure, P2 = 270 psia Find  Isentropic efficiency

Q: Refrigerant 134-a enters a compressor as saturated vapor at -20°C and leaves at 1.2 MPa and 80°C.…

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Q: An insulated piston-cylinder device contains 0.02 m³ of steam at 300 kPa and 200°C. Steam is now…

A: The initial volume of the steam, (V1)=0.02 m3The initial pressure of the steam, (P1)=300 kPaThe…

Q: A 0.5-m3 rigid tank contains refrigerant-134a initially at 250 kPa and 45 percent quality. Heat is…

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Q: (2) A well-insulated 114 m room initially at 4°C and 90 kPa is heated by the radiator of a steam…

A: Let m= mass of air  cv=specific heat of air at constant volume=0.718KJ/kgK T=Temp. of air before…

Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 1.5 kg of…

A: Here we will refer to the steam table to get the values of specific volume and entropy at the…

Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of…

A: To find: The entropy change of water during the process. Given  The mass of compressed liquid m=2.5…

Q: Steam enters a turbine at 6 MPa and 450°C at a rate of 33 kg/s and exits at 50 kPa as saturated…

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Q: Air is compressed in an adiabatic compressor from 55 psia and 660 R to 270 psia and 1200 R.…

A: Given   Initial pressure, P1 = 55 psia    Final pressure, P2 = 270 psia Find  Isentropic efficiency

Q: Refrigerant-134a is converted from a saturated liquid to a saturated vapor in a closed system using…

A: The destruction exergy in case of 100 kPa is written as,   xdes=T0s2-s1-hevapTsOn using table…

Q: An adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the…

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Q: Ten lbm of R-134a is expanded without any heat transfer in a closed system from 120 psia and 100°F…

A: Given Data  Properties of R-134a (table) At state 1 ( Before isentropic process) P1=120 psia…

Q: Oxygen gas is compressed in a piston–cylinder device from an initial state of 12 ft3 /lbm and 75°F…

A: Given data: The characteristic gas constant for oxygen is The specific heat at constant volume for…

Q: A well-insulated 4-m × 4-m × 5-m room initially at 10°C is heated by the radiator of a steam heating…

A: Given data T1=10°cV=15 LP1=200 KPaWfan=120 WP2=100 kPa