Carnot cycle(8) S.J.T.U. Phase Transformation and Applications Isothermal Adiabatic Isothermal Adiabatic A->B B->C C->D D->A ∑ C(T-T)<0 W -Rm,n5<0 RT I V3 C(T-T)>0 R(T-T2)I V20 V V2,0 RT2In V2,0 RT In V40 RT-T) △U 0 C(T-T2)<0 0 C(T-T)>0 0 k-k 9+ 1=0 Va L SJTU Physical Chemistry of Materials Spring2010©X.J.Jin Lecture 5 property relation IPhase Transformation and Applications S. J. T. U. SJTU Physical Chemistry of Materials Spring 2010 © X. J. Jin Lecture 5 property relation I Carnot cycle (8) W ln 0 3 4 1  V V Q ln 0 RT 1 2 2  V V RT ln 0 1 2  2  V V RT U 0 A->B B->C C->D D->A 0 Isothermal Adiabatic Isothermal Adiabatic ln 0 3 4  1  V V RT 0 0 CV (T1 T2 )  0 CV (T2 T1 )  0 CV (T1 T2 )  0 CV (T2 T1 )  0  0  ln 0 1 2 1  2  V V R T T  ln 0 1 2 2  1  V V R T T Q2 Q1 0 1 1 2 2   T Q T Q 4 3 1 2 V V V V 