An insulated piston-cylinder device contains 0.05 m³ of refrigerant- 134a at 32°C and quality of 0.9. The refrigerant is now allowed to expand in a reversible manner until the pressure drops to 0.4 MPa. Determine R-134a 0.05 m³ 32°C x = 0.9 Figure P1 Schematic for Problem 1 (a) the initial pressure of the refrigerant-134a, (b) the final temperature in the cylinder, (c) the work done by the refrigerant.

Q: the change in the entropy by using average specific heat. the change in the exergy. the useful work.…

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Q: The adiabatic compressor in a refrigerator compresses saturated R-134a vapor at -10.0°F to 200 psia.…

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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: Given:-              v = 1143T = 4° CP = 90 kPa100 kPa after 146 mm      40 L From the steam table…

Q: (2) A well-insulated 106 m³ room initially at 3°C and 88 kPa is heated by the radiator of a steam…

A: Given that, Volume of isulated room, v=106 m3Initial temperature, T1=3 °C,Initial Pressure, P1=88…

Q: A piston-cylinder device contains 0.66 kg of nitrogen gas at 140 kPa and 37°C. The gas is now…

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Q: A piston-cylinder assembly contains R-134a refrigerant in a volume of 0.15 m3, 0.28 MPa and 40 ° C.…

A: Given data, Process 1-2 :- According to the question, a pin fixed the piston at a point. Now, the…

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: Beal eyeks A 0.8-m insulated rigid tank contains 2 kg of carbon dioxide at 90 kPa. Now paddle- wheel…

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Q: Consider a well-insulated piston cylinder device and it contains 3 L of saturated liquid refrigerant…

A: Data given in this problem :⇒Volume of liquid (V)= 3 litre = 3×10-3 m3 ⇒ Density of R 134-a =ρ=…

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Q: 2. During some actual expansion and compression processes in piston-cylinder devices, the gases have…

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Q: 6. 2 kg/sec of air has a decrease of internal energy of 25 KJ while its Centigrade temperature 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: que iswer is submited, you will be unable to return to this part. Air is compressed in a…

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Q: At 3MPa and 400C, 2 kg/s steam flows into a turbine. It exits at 300kPa. The turbine has an…

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Q: 2. Steam enters an adiabatic turbine at 8 MPa and 500 °C with a mass flow rate of 3 kg/s and leaves…

A: hin8MPa and 5000C=3399.5kJ/kgsin=s8MPa and 5000C=6.7266kJ/kg.K sfat 30kPa=0.9441kJ/kg.Ksfgat…

Q: A 0.1 m3 rigid tank contains refrigerant R-134a, initially at 800 kPa and 40°C. Heat is now…

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Q: A 0.25 m^3 rigid tank contains refrigerant-134a at 0.8 MPa and 100 percent quality. The tank is…

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Q: An 22 m3 rigid tank initially contains Argon gas at 152 kPa and 28 oC. The tank is connected by a…

A: (a) To find: The final temperature of the tank in Kelvin. Given: The initial volume of the tank is…

Q: 3.9 m3/s of saturated water vapor enters a compressor at 250 kPa and leaves it with a pressure equal…

A: Refrigeration is a device used to produce cooling by dissipating heat in the form of fluid or…

Q: piston-cylinder

A: OPTION b) 8.712 Btu/R

Q: A clased system has water at 4 MPa and 400 °C, wnich undergoes an is0thermal reversible compression…

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Q: During a reversible polytropic process, the following data were observed: V1=4.3ft³, p1= 28.2 psia,…

A: Given data: V1=4.3 ft3, P1=28.2 psia=28.2×144 lb/ft2=4060.8 lb/ft2 ; V2=12.8 ft3, P2=12.6…

Q: An insulated tank contains 5 kg of water at a pressure of 75 kPa and 40% of its mass is in the vapor…

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Q: Question 3 An insulated 1.15 m³ rigid tank contains air at 350 kPa and 50°C. A valve connected to…

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Q: Argon (3 kg) is compressed adiabatically in a piston-cylinder device from 0.41 m³, 0.1 MPa and 27…

A: Solution.

Q: Two rigid tanks are connected by a valve. Tank A contains 0.25 m³ of water at 450 kPa and 75 percent…

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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

Q: A Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40°C…

A: Solution: Gas constant of R-134a R=0.08149kJ/kg.k a) Mass of the refrigerant…

Q: Problem 2 An insulated piston-cylinder device contains 0.2 m³ of saturated refrigerant R-134a vapor…

A: The piston cylinder is insulated.The volume of saturated refrigerant vapor is .The initial pressure…

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.