SIMPLE ESTIMATION OF BULK THERMODYNAMIC PROPERTIES AND SURFACE-TENSION OF POLAR FLUIDS

An effective pair potential reduces the dipole-dipole interactions in a polar fluid to spherically symmetric form. In this way it is shown t hat the Stockmayer model of polar fluids can be reduced for weak to mo derately strong polar interactions to a Lennard-Jones form wherein the potential parameters are temperature dependent, Bulk properties and s urface tension can then be obtained by standard simple fluid methods. The generalized van der Waals theory is used to calculate the surface tension of hydrogen halide single-component fluids (HCl, HBr, and HI). (C) 1995 Academic Press, Inc.