Condition of equilibrium(3) S.J.T.U. Phase Transformation and Applications (G+PE+KE)2dn-(G+PE+KE)dn,oWc Condition of equilibrium 8W,em1→2=0 G+PE+KE)dn,=G+PE+KE)dn At the same potential energy level and kinetic level G,2-Gn,=AG,=0G,2=G1 4,2=4,1 In term of the chemical potential of i States 1 and 2 are in equilibrium with respect to material i if the partial molar Gibbs free energy (or chemical potential)of i is the same in both states. SJTU Thermodynamics of Materials Spring2007©X.J.Jin Lecture 7 equilibrium IPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2007 © X. J. Jin Lecture 7 equilibrium I Condition of equilibrium (３) ( ) ( ) ++ 2, ii ++− 1, ii = δWdnKEPEGdnKEPEG rev Condition of equilibrium δWrev →21. = 0 ( ) ( ) ii ii ++ 2, ++= 1, dnKEPEGdnKEPEG ( ) 0 1,2, GdnGG iiii =Δ=− = GG ii 1,2, ii 1,2, At the same potential energy level and kinetic level μ = μ In term of the chemical potential of i States 1 and 2 are in equilibrium with respect to material i if the partial molar Gibbs free energy (or chemical potential) of i is the same in both states