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THERMODYNAMIC PARAMETERS FOR DISSOLVED GASES*

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Abstract

In 1958 and subsequently we correlated properties of solutions of gases in liquids by using the “force constants,” ε/k, and collision diameters, σ, which serve as parameters in equations for molecular pair potential energy such as that of Lennard-Jones or its variants. Unfortunately, however, the figures for these parameters that have been published are so scattered for the same gas as to make it difficult to select “best” values; in 1967, therefore, I substituted for these indirectly determined molecular parameters the directly and accurately known molal energy of vaporization, ΔEbv, and the molal volume, vb, of the liquefied gas, both at its boiling point. A plot of values of ΔE2v against the most trustworthy values of ε/k reveals direct proportionality. The same is true for Vb1/3 versus σ.

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