1- A piston-cylinder device whose piston is resting on top of stops initially contains 0.5 kg of helium gas at 100 kPa and 25 C. The mass of the piston is such that 500 kPa of pressure is required to raise it. (1) How much heat must be transferred to the helium before the piston starts rising and (2) show the process on P-V diagram

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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.