Thermodynamic properties of a fluid of polarizable hard spheres with multipolar interactions

Abstract

Molar volume, compressibility, entropy and Gibbs' free energy are calculated for a system of polarizable hard spheres with permanent ideal dipoles and/or quadrupoles as functions of pressure, temperature, polarizability, dipole moments and quadrupole moments by use of thermodynamic perturbation theory. These properties, and the vapour/liquid coexistence curve as predicted by the same theory, are discussed in terms of the relative importance of the dipole and quadrupole moments.