A 2 m3 rigid tank filled with water is initially at 400 kPa and temperature of 300oC . The water is cooled until the pressure reaches 150 kPa. Determine i. total mass of water in the tank, kg and ii. change in internal energy, kJ Show the states and process on a pressure versus specific volume ( P-v) diagram, with respect to saturation lines.

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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.