Entropy as a State Function(3) S.J.T.U. Phase Transformation and Applications B 兴-)9)， 兴)=兰)-〔) 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 Spring2005©X.J.Jin Lecture 5 property relationPhase Transformation and Applications S. J. T. U. SJTU Physical Chemistry of Materials Spring 2005 © X. J. Jin Lecture 5 property relation Entropy as a State Function(3) ⎟ = 0 ⎠⎞ ⎜⎝⎛ ⎟ + ⎠⎞ ⎜⎝⎛ = ∫∫∫ α β δδ δ AB r BA r r TQ TQ TQ α β β δ δ δ ∫∫∫ ⎟⎠⎞ ⎜⎝⎛ ⎟ = ⎠⎞ ⎜⎝⎛ ⎟ −= ⎠⎞ ⎜⎝⎛ BA r AB r BA r TQ TQ TQ P V A B α β 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