12.44: A monatomic ideal gas is the working substance for a refrigerat
8mhs cgvvua4a39/:ue or that undergoes the cyclic process (ABCDA) shown in the PV diagram. The processes are all isochoric or isobaric with pressures betw
8:g uucv3a4h/9aem vs een $P_0$ and $2P_0$ and volumes between $V_0$ and 2$V_0$ . What is the coefficient of performance for this refrigerator?