Tests on an adiabatic gas compressor yield values for inlet conditions $(T_1,P_1)$ and outlet conditions $(T_2,P_2).$ Assuming the gas to be

ideal with constant heat capacities, determine the compressor efficiency for the following:

$T_1=305K,P_1=\frac{1\mathrm{.}5}{b}ar,T_2=496K,P_2=7$ bar, and $\frac{C_P}{R}=\frac{8}{2}$

The compressor efficiency is