Gas–gas equilibria of aqueous fluid binary mixtures

Abstract

In a previous work [Chem. Phys. Lett. 100, 378 (1983)], by the application of thermodynamic perturbation theory to the polarizable hard-spheres dipole model, we found that on the P–T diagram the critical curve for the Ar–H2O mixture exhibits a negative slope. The same behavior on the critical curve has been found in a recent experimental reinvestigation of this mixture. Here it is investigated whether the theoretical approach can also predict the gas–gas equilibria of type I of the aqueous fluid binary mixtures. Good agreement with the experimental data is found for He–H2O and H2–H2O binary mixtures.