Thermodynamic activity (3) S.J.T.U. Phase Transformation and Applications Pure state as standard state f=f xifp C1≡ fi=xif f f Qi =xi (ideal solution) SJTU Thermodynamics of Materials Spring2006©X.J.Jin Lecture 12 Solution IPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Lecture 12 Solution I p i i = ff D D i p i i i f fx α = ii α = x (ideal solution) Pure state as standard state Thermodynamic activity (3) D i i i f f α ≡ p ii i = fxf