12.44: A monatomic ideal gas
p2k n 3m1gou bmw46k75nii.nbis the working substance for a refrigerator that undergoes the cyclic proce
ni 7un2.5ommb4kki1 g b npw36ss (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressures between $P_0$ and $2P_0$ and volumes between $V_0$ and 2$V_0$ . What is the coefficient of performance for this refrigerator?