15:48:33 Non-ideal Solution (4) S.J.T.U. Phase Transformation and Applications Page 21/46 XB=1 1.0 ag-1 aB Ideal solution OB -YBXB GB RTIndB =RTIn(YBXB) A B B之 1.0 Figure 7.9 Plot of activity versus composition for a nonideal solution. 0 Pure Figure 7.1 Fugacity of componentif)and activity of component i(a)as a function of mole fraction (x)for an ideal solution. SJTU Thermodynamics of Materials Spring 2007 ©X.J.Jin Lecture 12 Solution IlPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2007 © X. J. Jin Lecture 12 Solution II Page 21/46 15:48:33 Non-ideal Solution (4) BBB α = γ x ln )ln( B B BB = RTG α = γ xRT xB=1 aB=1