A piston-cylinder device initially contains 0.07 m3 of nitrogen gas at 130 kPa and 120oC. The nitrogen is now expanded polytropically to a state of 100 kPa and 100oC. a. Indicate knowns and unknows for each state as well as what type of process is performed to get from one state to another. State any assumptions b. Determine the boundary work done during the processc. Draw the P-v diagram for 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.