Abstract
Experimental determinations of the vapour—liquid equilibria of HCl/CF4 at 159.01 and 173.08 K are presented together with the evaluation of the excess properties GE and HE )at 162.97 K) over the limited solubility range of the two components at these temperatures. The system exhibits liquid—liquid immiscibility and shows the presence of a heterogeneous azeotrope at xHCl ≅ 0.1 at 173.08 K and xHCl ≅ 0.05 at 159.01 K. Theoretical predictions of both the vapour—liquid equilibria and the excess Gibbs free energy are made using perturbation theory. The importance of including induction effects, both isotropic and anisotropic, in the description of the intermolecular potential models is clearly demonstrated.
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