(Vapour + liquid) equilibria, limiting activity coefficients, and excess molar volumes of {1-bromo-1-chloro-2,2,2-trifluoroethane (halothane) + tetrachloromethane or trichloromethane or 1,1,1-trichloroethane}

Abstract

The thermodynamic behaviour of {1-bromo-1-chloro-2,2,2-trifluoroethane (halothane) + tetrachloromethane or trichloromethane or 1,1,1-trichloroethane} has been investigated. Excess molar volumes were determined at 298.15 K with a tilting dilution dilatometer, vapour-liquid equilibria were measured at 318.15 K by a dynamic method, and limiting activity coefficients were determined by comparative ebulliometry. The results obtained for the (vapour + liquid) equilibria were verified by effective statistical procedures and used to calculate excess Gibbs molar energies. The unknown second cross virial coefficients were calculated on the basis of redundant information provided by complete results for the (vapour + liquid) equilibria. The results support the hypothesis of weak solvation effects in (halothane + trichloromethane or 1,1,1-trichloroethane).