Stephen L. Parrott

Solute-Solute Interactions in Dilute Solutions of Gases in Liquids

Equations are developed to extract in-solution solute-solute virial coefficients from gas-liquid phase equilibrium data. Experimental data for the solubility of helium, neon and hydrogen in liquid argon are analyzed and second virial coefficients for these solutes, B 2 * , in liquid argon are determined over the entire liquid range of argon from 84° to 148°K. The values of B 2 * are negative at the lowest temperature and approach zero or positive values as the critical temperature of argon is approached. The magnitude and temperature dependence of the virial coefficients are considered in terms of the reversible work of cavity formation and an effective local density.