Abstract
The aim of this work was to study the solubility of hexafluorobenzene in aqueous salt solutions because, despite its interest, information about the solubility of perfluorocarbons in aqueous solutions was previously not available. The solubility of the perfluorocarbon in water and aqueous salt solutions was measured using a liquid-liquid extraction method. The method was validated by comparing the measured solubility of ethylbenzene in water with the literature data. The estimated uncertainty in the experimental data is less than 6%. The effect of the salt concentration and the cation/anion effect on the solubility were also established. Solubility data was measured in the temperature range from (280 to 340) K at atmospheric pressure. Thermodynamic functions such as the Gibbs energy, enthalpy, and entropy of solution were obtained from the temperature dependence of the solubility data. From the data on the enthalpies of solution, values of the enthalpy of solvation in the solvents were determined and discussed.
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