THERMODYNAMIC SOLUBILITY BEHAVIOR OF CARBON-DIOXIDE IN ACETONE

An experimental study involving the solubility of carbon dioxide in acetone has been described. Two separate sets of experimental data were collected and employed to produce absorption isotherms at 20.0 and 30.0-degrees-C and at carbon dioxide partial pressures ranging between zero and approximately 10 atm. The experimental data were also employed to show that Henry's Law is obeyed over a very wide range of pressures when mole fractions of dissolved solute (i.e. carbon dioxide) were plotted against corresponding fugacities instead of equilibrium partial pressures. A thermodynamic analysis of this system also permitted a determination of the enthalpy of vaporization of carbon dioxide dissolved in acetone. At very low concentrations of dissolved carbon dioxide, this thermodynamic analysis indicated relatively high enthalpies of vaporization for the dissolved carbon dioxide. This result is in accord with the very high solubility of carbon dioxide in acetone.