An ideal gas is undergoing a mechanically reversible process consisting of four steps: (1->2) adiabatic compression from Vi=0.1 m3, Pl=1 bar to V2, P2=5 bar (2->3) isobaric expansion at P2=5 bar until a temperature T3=80 'C is reached. (3->4) isothermal expansion until a pressure of P4=3.5 bar is reached. (4->1) isochoric process to return to Pi, V, . Calculate Q, W, AU, AH for each branch and for the complete cycle. y=Cp/Cv=7R/5R Draw this process on a pressure vs. Volume diagram and carefully label all points. Be systematic, show all your work.

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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.