Two pounds mass of water in a piston-cylinder assembly, initially a saturated liquid at 35 lb/in², undergoes a constant pressure, internally reversible expansion to x2 = 90%. For this reversible process, determine the work by integrating p dV and the heat transfer by integrating T dS, each in Btu.

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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.