Abstract
Measurements are reported of Ostwald solubility (L) and mole fraction solubility (x2) for Xe gas, in the form of the radioisotope 133Xe, in three liquid perfluoroalkanes from 5–25 or 5–50 °C. Results at 25.0 °C are L(133Xe in n-C6F14)=2.11±0.01, L(133Xe in C7F16) =1.95±0.01, and L(133Xe in C8F18)=1.85±0.01. From these data the chemical potentials on the number density scale and mole fraction scale, respectively, Δμ0ρ2 and Δμ02, are calculated as functions of temperature. The corresponding average enthalpy and entropy of solvation, on both scales, are also determined. Results of scaled particle theory and of surface energy theory are compared with experimental thermodynamic quantities. The comparisons are suggestive but better data on solvent properties are needed for a definitive comparison.
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