Equilibrium properties of polar gases. Part 2.—The second dielectric virial coefficients of some polar gases

Abstract

The second dielectric virial coefficients ℬ for five polar gases CHF₃, CHF₂Cl, CH₃Cl, CH₂:CF₂ and (CH₃)₂O were measured at 30, 50 and 70°C. for the gases CF₃Cl and CF₂Cl₂, ℬ was measured at 50°C only. The experimental results were compared with those predicted by the forms of intermolecular potential that have been suggested for polar gases. None of these proves to be entirely satisfactory.