A piston cylinder contains 0.72 kg of air initially at 450 kPa and 225 °C, now the air expands in a process such that the pressure is linearly decreasing with volume to a final state of 100 kPa and 25°C. Determine the amount of work during this process (kJ). Select one: Oa. 75.89 Ob. 106.45 Oc. 89.63 Od. 122.99 O e. None of the above

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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.