A piston-cylinder with 25 grams of saturated water within. Is kept at a pressure of 300 kpa. A heater inside supplies We,in =7.2kJ while the cylinder loses 3.7 kJ of heat. Show that the boundary Wb and the change in internal energy ∆U in this problem can be combined to form ∆H anf find the final temperatire in Celsius.

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A: Given data ,  P1= 0.046 bar  P2 = 0.107 bar

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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.