5.5 SOURCES OF INFORMATION ON AG(1) S.J.T.U. Phase Transformation and Applications AG=∑n,AG.r-∑n,AGi.r products reactan ts △G=AH?-TAS? AHlAFACidT As;-ASCE)dT AGiT =A+BT+CTInT SJTU Thermodynamics of Materials Spring 2006 ©X.J.Jin Lecture 9 Chemical equilibrium llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 9 Chemical equilibrium II 5.5 SOURCES OF INFORMATION ON ΔG˚ (1) ∑ ∑ Δ−Δ=Δ tsreac Tfr products T p GnG Tf Gn tan , , D D D D D D T T T Δ−Δ=Δ STHG ∫ Δ+Δ=Δ T T T P HH dTC 298 ,298 D D D ∫ Δ +Δ=Δ T P T T dT TC SS 298 ,298 )( D D D ,Tf ++=Δ lnTCTBTAGD