Physical Chemistry Nonideal Solutions Activity and Activity Coefficients u=u,+RTIn x idealsolution (9.42) 1≡1(T,P) idealsolution (9.43) 从1=1(T,P)+RThx,mr≠ A ideally dilute solution99 H42=C+Rrhx1,=(,P)b(600 u;=u:+RTIn x idealor ideallydilute solution(10.1) RT RT idealor ideallydilute solution (10.2)6 Activity and Activity Coefficients Nonideal Solutions ln , ( , ) * RT x A T P o A A o  A =  A +    T P RT xi for i A o i = i ( , ) + ln  ideally dilute solution (9.59)* ideally dilute solution (9.60)* i i RT ln xi ideal solution *  =  + (9.42)* ( , ) ideal solution * i T P o i   (9.43)* i ideal or ideally dilute solution o i id i  =  + RT ln x (10.1)*         − = RT x o i id i i   ln         − = RT x o i id i i   exp ideal or ideally dilute solution (10.2) Physical Chemistry