Consider a piston-cylinder device that consists of 2 kg of R-134a at 40°C and x = 0.7. The system is cooled until the temperature drops to 18°C. State the final phase of R-134a in the piston cylinder device and give the volume (m³) of the system at final phase.

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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.