One Kilogram of steam is contained in a piston/cylinder device at 800 kPa and 200°C. (a) If it undergoes a mechanically reversible, isothermal expansion to 150 kPa, how much heat does it absorb? (b) If it undergoes a reversible, adiabatic expansion to 150 kPa, what is its final tem- perature and how much work is done?

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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.