Solubility of gases in fluoroorganic alcohols. Part II. Solubilities of noble gases in (water + 1,1,1,3,3,3-hexafluoropropan-2-ol) at 298.15 K and 101.33 kPa

Solubilities of noble gases He, Ne, Ar, Kr and Xe in mixtures of {water + 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP)} at 298.15 K and 101.33 kPa partial pressure of gas are reported. A polynomial dependence of the solubilities on the mole fraction of the binary liquid mixture is found. The Henry’s constants at the vapor pressure of the mixture, the standard changes in the Gibbs free energy for the solution process and for the solvation process, and the so-called excess Henry’s constant are calculated. The results have been compared with those obtained by scaled particle theory (SPT).

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► Solubility of He, Ne, Ar, Kr and Xe in (water + HFIP) at 298.15 K and 101.33 kPa was determined.
► Changes in the Gibbs free energies of the solution and solvation processes were calculated.
► lnKH3,12E are negative except in the zone highly dilute in HFIP (xHFIP < 0.04).
► Solubility of low soluble gases reflects the behavior of the solvent mixture.
► SPT provides acceptable results despite its simplicity.