Abstract: Based on the liquid model of statistical thermodynamics and the concept of local composition, the equations of Gibbs free energy and activity coefficient of liquid mixtures are derived. The equation of viscosity of liquid mixtures is obtained by combining the model with the theory of reaction rate. Then the correlation between viscosity and vapor-liquid equilibrium is obtained. Predictions of vapor-liquid equilibrium data of 14 binary systems from viscosities of liquid mixtures are given in this paper. The predicted results agree with experimental data. It is shown that the equations and the prediction method are of good applicability and reliability.

摘要： <正>液体混合物的汽液平衡数据和粘度数据都是基本的物性数据,人们很早就开始了对它们的研究,并取得了不小的进展.对于汽液平衡的研究,人们提出了许多溶液理论和活度系数方程,例如Flory-Huggins方程,Van Laar方程,Margules方程,Wilson方程和其修正方程,NRTL方程以及UNIQUAC方程等;对于液体混合物的粘度,人们也提出了许多流体粘度理论,其中最著名的是Eyring反应速率理论.作者曾应用这一理论建立了一个新的液体混合物粘度方程,用于关联二元体系的粘度数据和推算多元体系的粘度数据,结果令人满意.