Entropy as a State Function(3) S.J.T.U. Phase Transformation and Applications B -i〔)+〔婴)= 号=〔学)，-兽) 这一积分的数值与积分的途径无关，代表着某个状 态的改变量，定义为熵 For a close system the reversible heat flow divided by the absolute temperature of the system is a state or point function. 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 Entropy as a State Function(3)   0                      A B r B A r r T Q T Q T Q                               B A r A B r B A r T Q T Q T Q P V A B   这一积分的数值与积分的途径无关，代表着某个状 态的改变量，定义为熵 For a close system the reversible heat flow divided by the absolute temperature of the system is a state or point function