A piston–cylinder device contains 0.85 kg of refrigerant- 134a at 210ºC. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15ºC. Determine: (a) the final pressure,(b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a.

Q: A system containing air undergoes a polytropic process (polytropic exponent n= 1.3). During the…

A: Given:Polytropic index, n=1.3P1=100 kPaP2=1000 kPam=0.001 kgT1=10o C

Q: A frictionless piston-cylinder device initially contains 200 L of saturated liquid refrigerant-…

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Q: piston-cylinder arrangemen

A: SOLUTION GIVEN BELOW.

Q: (a) the final temperature, (b) the work done during this process, (c) the total heat transfers

A: Given: V1=0.9 m3 P1=350 kPa P2=400 kPa To determine: the final temperature, (b) the work done during…

Q: he piston cylinder system shown below contains R-410a at 20°C and 100 kPa. If the temperature of the…

A: Given:R-410aT=210°CP1=100 kPaT2=50°C

Q: A reciprocating cylinder contains water at a density of 0.01019 kg / liter at a pressure of 0.8 mpa.…

A: Given   Density = 0.01019 kg / liter                = 10.19 kg/m3 pressure = 0.8 MPa Find     The…

Q: Required information A piston-cylinder device contains 0.82 kg of refrigerant-134a at -10°C. The…

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Q: A spherical balloon with a diameter of 8.4 m is filled with helium at 27oC and 199 kPa. Determine…

A: A spherical balloon with a diameter of 8.4 m is filled with helium at T = 27°C = 300 K and 199 kPa.…

Q: What happens when a saturated liquid is cooled at constant pressure? What happens if it is heated at…

A: a) When a saturated liquid is cooled at constant pressure To understand the process, consider a T-v…

Q: (4) A mass of 3 kg of R-134a fill a piston-cylinder device with and initial volume of 0.279 m³ at a…

A: Refrigerant R-134a, also known as 1,1,1,2-tetrafluoroethane, R-134a, Freon 134a, Forane 134a,…

Q: A piston-cylinder device initially contains 0.3 gm of steam at 200kPa and 400°C. Now the steam is…

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Q: Determine internal energy of steam if its enthalpy, pressure and specific  volumes are 2848 kJ/kg,…

A: Given data h=2848 kJ/kgP=12 MPav=0.017 m3/kg Here, h is the enthalpy, P is the pressure and v is the…

Q: A Piston-cylinder containing 300 lit of steam at 700 kPa and 250oC undergoes a constant pressure…

A: Given Data State 1: 700 kPa, 250°C, 0.3 m3 State 2: 700 kPa, 70% quality

Q: A piston-cylinder device initially contains 0.6 m3 of saturated water vapor at 250 kPa. At this…

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Q: A tank, well insulated, has two parts divided by partition. The first part incuded 5,5 kg of water…

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Q: A piston–cylinder device initially contains 1 kg saturated liquid water at 200°C. Now heat is…

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Q: A cylinder fitted with a piston has a volume 0.1 m^3 and contains 0.5 kg of steam at 500 kPa. How…

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Q: A 15 liter rigid bottle contains 15 kg of the refrigerant R-134A and it is at a temperature of 20°C.…

A: Given that, Mass of the refrigerant R-134a, m=15 kg,Volume of bottle, V=15 liter,Temperature of…

Q: A spring of stiffness k = 500 N/m is mounted against the 10-kg block. If the block is subjected to…

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Q: (1)Refrigerant R-134a that has an initial volume of 1220 L at 320 kPa with a quality of 91 percent…

A: Given:V1=1220 L    =1220*10-3 m3P1=320 KPax1=0.9P2=500 KPaT2=150°C

Q: . A well-insulated piston-cylinder device contains 5 L of saturated water at a constant pressure of…

A: GivenV=5L=5×10-3 m3P=150KPaPw=500WI=8At=38minx=0.50

Q: A cooled time has a volume of 30.4 L at -14.68°C and 185.68 kPag. If the pressure and temperature…

A: Given data: P1 = 185.68 kPaV1 =30.4 LT1 = -14.68 °C = 258.32 KP2 = 213.32 kPaV2 =?T2= 47.6 °C =…

Q: The gas is compressed from an initial state of 3 0.35 m and 105 kPa to a final state of 0.14 m 3 and…

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Q: In this example, water is contained in a rigid container with a tight fitting lid. With a pressure…

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Q: Water is contained in a cylinder/piston arrangement fitted with upper stops which limit the volume…

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Q: A rigid, closed container contains water vapor. It is heated from a saturated liquid state at 200°C…

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Q: piston-cylinder arrangement contains 0.78-kg nitrogen and receives 10.791 of heat isothermally. The…

A: Handwriting.jpg

Q: A rigid tank whose volume is unknown is divided into two parts by a partition. One side of the tank…

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Q: contains saturated vapor only. Determine (a) the volume of the tank, (b) the final temperature and…

A: Given: m= 1.6 kg state 1 saturated liquid T1= 220oC V2=4V1 State 2 saturated vapor To determine: The…

Q: Need ASAP Three kg of air expands at constant temperature from a pressure of 880kPa and a volume of…

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Q: A 12-ft3 tank contains oxygen at 15 psia and 80◦F. A paddle wheel within the tank is rotated until…

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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.