5.7 VARIATION OF EQUILIBRIUM CONSTANT WITH TEMPERATURE S.J.T.U. Phase Transformation and Applications d(△G)=-△SdT △G°=△H°-T△S dAG)=△Cdr- H°dr T T Multiplying by 1/T,we obtain: T aag)=a-RInK.）)=AHrd宁） SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 10 electrochemistry IPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 10 electrochemistry I 5.7 VARIATION OF EQUILIBRIUM CONSTANT WITH TEMPERATURE Multiplying by 1/T , we obtain: dTSGd D D )( Δ−=Δ D D D Δ−Δ=Δ STHG dT T H dT T G Gd D D D Δ − Δ )( =Δ dT T H dT T G T Gd 2 2 )( D D D Δ −= Δ − Δ ) 1()ln()( T dHKRd TG d D D Δ=−= Δ α ) 1 )(ln (T d RH Kd D Δ α −= G 1 d( ) H d( ) T T Δ = Δ D D