There is 3.5 L saturated liquid water at 175 kPa pressure in the frictionless moving piston-cylinder system shown in the figure. The heat given to the system is 500 kJ and the electrical work is 1320 kJ. Since half of the water evaporates at constant pressure; a) Write the energy balance equation (First Law), b) Calculate the mass (kg) of water, c) Calculate the required shaft work (kW), d) Show the process in T-v and P-v diagrams, including saturated liquid and saturated vapor curves

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A: For solution refer below images.

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Q: Helium is to be compre kPa and 228 K to 440 k

A:

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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.