Physical Chemistry Solutions s Partial Molar Quantities IT'+ P OT' P, n aP T, n (9.6) T,P,n1≠ T P The partial molar volume one- phase syst (9.7) j丿T,Pn+j the amount of a substance j ni:the amount of all other substances present are constantPartial Molar Quantities Solutions r T P n r T P n P n T n dn n V dn n V dP P V dT T V dV i i r i i             + +           +          +        = , , 1 1 , , , , 1  (9.6) The partial molar volume . , , one phase syst n V V T P ni j j j −             (9.7)* Physical Chemistry nj : the amount of a substance j nij : the amount of all other substances present are constant