2. A frictionless piston-cylinder device initially contains 50 L of saturated liquid refrigerant-RI34a. The piston is free to move, and its mass is such that it maintains a pressure of 500 kPa on the refrigerant. The refrigerant is now heated until its temperature rises to 70°C. Calculate the work done during this process. R134a P=constant

Q: Inside a piston-cylinder device there is 5 kg of a moist water vapor at 125 kPa. At the beginning…

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

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Q: A piston/cylinder assembly with a spring contains 0.075 kg of water. The piston is initially resting…

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Q: Calculate the boundary work done by the system during this process

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Q: Air is contained in a piston-cylinder device at 600 kPa and 927°C, and occupies a volume of 0.8 m³.…

A: To findSketch the system showing the energies crossing the boundary and the P-V diagram for the…

Q: A frictionless piston-cylinder device contains 2.5 kg of nitrogen at 100 kPa and 250 K. Nitrogen is…

A: According to the given dataThe mass of nitrogen is m = 2.5 kgThe initial pressure is P1 = 100 kPaThe…

Q: A frictionless piston-cylinder device initially contains 200L of saturated liquid refrigerant-134a.…

A: 1. Given, V1=200LP1=P2=900KPaT2=70°CFrom the steam table Properties of refrigerant R-134a at…

Q: 3. 0.1 kg of Water is compressed in a piston cylinder assembly adiabatically. The water starts out…

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Q: Q2/ A cylinder and a piston hokding a spring containing 2 kg of oxygen at a pressure of 350 kPa and…

A: GivenP1=350kPa=350×103N/m2P2=150kPa=150×103 N/m2T1=250°C=250+273=523KT2=60°C=150+273=333KMass of…

Q: 0.3 kg of carbon dioxide is contained in a cylinder with a piston. Initial conditions are 200 kPa…

A: Given data  mass of carbon di oxide (m) = 0.3 kg  Initial pressure (P1) = 200 kPa Initial…

Q: 2 lbm of refrigerant-134a occupy a 3 ft^3 system at 50 psia. In what state is the refrigerant…

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Q: In what state will water be if the pressure and internal energy are 750 kPa and 1000 kJ/kg,…

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Q: 4-65E A 10 ft³ tank contains oxygen initially at 14.7 psia and 80°F. A paddle wheel within the tank…

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Q: 0.5 kg of air with a pressure of 2 MPa and a temperature of 250 °C expands while satisfying the…

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Q: Thermodynamic. Determine the work needed to compress from V1=30 lt to V2=5 lt a gas applying a…

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Q: 4-31E A 20 ft³ rigid tank initially contains saturated refrigerant-134a vapor at 160 psia. As a…

A: Properties of the refrigerant R134a at 160 psia:Properties of the refrigerant R134a at 50 psia:

Q: One kg of superheated steam is at 400 kPa and 400°C. Heat is added to raise the temperature to…

A: The heat required to increase the temperature of a substance is given by the formula,

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.