A generalized corresponding-states method for the prediction of surface tension of pure liquids and liquid mixtures

Abstract

We recently developed an extension of the three-parameter corresponding-state principle based on the properties of two nonspherical reference fluids for the viscosity and thermal conductivities of liquids and liquid mixtures. We extend the method here to surface tension. We have tested the method on six binary mixtures using the pure components as reference fluids. Good agreement between experimental and predicted values of surface tension was obtained using only the data for the pure components. The agreement is even better if a single binary interaction constant, independent of temperature and composition, is used in the mixture calculations. It is also shown how the unknown surface tension of any given fluid can be obtained from the known properties of two (similar) reference fluids.