An insulated piston-cylinder arrangement contains water. Sixty percent of the total 15 kg of water are in the vapor phase. Steam at 1 MPa and 400°C is allowed to enter the cylinder from a supply line until all of the liquid in the cylinder is vaporized. The mass of the piston is such that it maintains a constant pressure of 200 kPa inside the cylinder. Assume the surroundings to be at 25°C and 100 kPa. Determine a) the amount of steam that enters in the cylinder and b) the entropy generation during this process.

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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.