Condition of equilibrium(2) S.J.T.U. Phase Transformation and Applications Deal with partial molar quantities First law +PE+KE)dn.-(H+PE+KE)dn2++W=du Second law 5n,1-S,2dn2+ hw =ds -7m+西aM了-xm酸-1s The properties of the machine do not change at steady state dU and dS-0 G+PE+KE)2dn,2-G+PE+KE)dm =oWeo 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 (2) dS T lw T Q dnSdnS iiii =−+− δ δ 2,2,1,1, ( ) ++ i 1, i 1, ( ++− )i 2, i 2, δδ =++ dUWQdnKEPEHdnKEPEH Deal with partial molar quantities iiii 2,2,1,1, δδ −=+−+− TdSlwQdnSTdnST The properties of the machine do not change at steady state dU=0 and dS=0 First law Second law ( ) ( ) ++ ii 2,2, ++− ii 1,1, = δWdnKEPEGdnKEPEG rev