(6)A mass of 1 kg of air is contained in a variable-load piston device equipped with a paddle wheel. Initially, air is at 340 kPa and 22°C. The paddle wheel is now turned by an external electric motor until 95 kJ/kg of work has been transferred to air. During this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to double. Calculate the required amount of heat transfer. Air (1)

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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.