212=Cyml 23=2C P p, m 23 3 34=-2Cvm7 12 Q34Q41=Cpmn(71-74)=C2m7 4 2+923 41 C +2c C=c+r W=(P2-p1)(V4-V1)=p11=RT REN 77 O NO 3Cm+2h)15:3%( 3 m 2 ) 1 , 1 T C R RT V + = QW Q Q Q1 1 1 2 = −  = = 15.3 % Cp,m = CV ,m + R ( )( ) 2 1 V4 V1 W = p − p − = p1V1=RT1 Q1 = Q12 + Q23 41 ,m 1 4 ,m 1 Q = Cp (T −T ) = −Cp T = CV ,mT1 + 2Cp,mT1 1 4 V1 V4 2 3 1 p 2 pPo V Q12 Q34 Q41 Q23 Q12 = CV ,mT1 23 ,m 1 Q = 2Cp T Q34 = −2CV ,mT1