1. A cylinder contains 0.45 m3 of a gas at 1 bar and 80°C. The gas is compressed to a volume of 0.13 m3 and a pressure of 5 bar. Determine the following with aid of a NEAT DIAGRAM: a. The mass of gas b. The value of index ‘n’ for compression c. The increase in internal energy of the gas d. The heat received or rejected by the gas during the compression. Take g = 1.33, R = 0.2942 kJ/kgK

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A: P1=P2=P5=10 barP3=P4=5 barV2=V3V4=V5x4=0.45T3=180°C=453 K

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.