Condition of equilibrium(2) S.J.T.U. Phase Transformation and Applications Deal with partial molar quantities First law +PE+KE)a dn.-(+PE+KE).2dn2++W=du Second law 51-5,dm2+9 =ds T -TSdn.+TS,.dn.2-80+8w=-TdS The poperties of the machine do not change at steady state du-0and ds-0 G+PE+KE)dn2-G+PE+KE)dn.=OWc SJTU Thermodynamics of Materials Fall 2018 ©X.J.Jin Lecture 7 equilibrium IPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2018 © X. J. Jin Lecture 7 equilibrium I Condition of equilibrium (2) dS T lw T Q Si dni −Si dni + − =   ,1 ,1 ,2 ,2 (H + PE + KE)i,1 d ni,1 −(H + PE + KE)i,2 d ni,2 +Q +W = dU Deal with partial molar quantities −TSi,1 dni,1 +TSi,2 dni,2 −Q +lw= −TdS First law Second law The properties of the machine do not change at steady state dU=0 and dS=0 ( ) ( ) G + PE + KE i,2 d ni,2 − G + PE + KE i,1 d ni,1 = Wrev