A possible ideal-gas cycle operates as follows:
((i)) from an initial state (p1,V1) the gas is cooled at constant pressure to (p1,V2);
((ii)) the gas is heated at constant volume to (p2,V2);
((iii)) the gas expands adiabatically back to (p1,V1).
Assuming constant heat capacities, show that the thermal efficiency is
1−γ(p2/p1)−1(V1/V2)−1.(13.41)
(You may quote the fact that in an adiabatic change of an ideal gas, pVγ stays constant, where γ=cp/cV.)