He gas undergoes adiabatic expansion at P1 = 8 bar, T1 = 750K to T2 = 400K. Then, the gas is heated at constant P back to T3 = 750K. If the process is to be replaced by a single isothermal expansion step to an arbitrary pressure P, what value of P (in bar) will result to the same work as the original process? Assume helium is an ideal gas with constant heat capacity. a.1.56 b.0.90 c.2.49 d.1.66

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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.