Introduction S.J.T.U. Phase Transformation and Applications Physical equilibrium. Chemical equilibrium. Activity Fugacity dG Vdp(dG =-SdT+VdP,withdT=0) dG=RT P -RTdInP P SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 9 Chemical equilibrium IlPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 9 Chemical equilibrium II Introduction Physical equilibrium. Chemical equilibrium. Activity Fugacity = ( = − + withdTVdPSdTdGVdPdG = )0, PRTd P dP RTGd == ln