简单混合物 Simple mixtures 偏摩尔体积 Partial molar Volume V≠V1+V 1+1≠2 Add 1.0 mol ho Add 1.0 mol Ho Volume increases Volume increases by 18 cm'mol Large H○ EtoH by 14 cm'mol volumes Molar volume of ho: Partial molar volume of 18 cm mol 1 HO in EtoH: 14 cm mol 1 Partial molar volume of substance a in a mixture is the change in volume per mole of a added to the large volume of the mixture简单混合物 Simple Mixtures 偏摩尔体积 Partial Molar Volume Partial molar volume of substance A in a mixture is the change in volume per mole of A added to the large volume of the mixture. V  V1 + V2 1 + 1  2