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Unformatted text preview: 3.2. IDEAL AND NON-IDEAL MIXTURES 77 3.2 Ideal and non-ideal mixtures A general extensive property, such as U , for an N-species mixture will be such that U = U ( T,P,n 1 ,n 2 ,...,n N ) . (3.36) A partial molar property is a generalization of an intensive property, and is defined such that it is the partial derivative of an extensive property with respect to number of moles, with T and P held constant . For internal energy, then the partial molar internal energy is u i U n i vextendsingle vextendsingle vextendsingle vextendsingle T,P,n j ,i negationslash = j . (3.37) Pressure and temperature are held constant because those are convenient variables to control in an experiment. One also has the partial molar volume v i = V n i vextendsingle vextendsingle vextendsingle vextendsingle T,P,n j ,i negationslash = j . (3.38) It shall be soon seen that there are other natural ways to think of the volume per mole....
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This note was uploaded on 11/26/2011 for the course EGN 3381 taught by Professor Park-sou during the Fall '11 term at FSU.
- Fall '11