Total vapour pressure and excess Gibbs energy for binary mixtures of 1,1,2,2-tetrachloroethane or tetrachloroethene with tetrachloromethane at nine temperatures

Vapour pressures of tetrachloromethane + 1,1,2,2-tetrachloroethane (or +tetrachloroethene) at nine temperatures between 283.15 and 323.15 K were measured by a static method. The reduction of the vapour pressures to obtain activity coefficients and excess molar Gibbs energies was carried out by fitting the vapour pressure data to the Redlich–Kister polynomial according to Barkerʹs method. A comparative analysis about the thermodynamic behaviour of both systems is performed, taking into account the resonance effect in tetrachloroethene and self-association in 1,1,2,2-tetrachloroethane. For the 1,1,2,2-tetrachloroethane + tetrachloromethane system we have fitted dispersive interchange coefficients for the DISQUAC-model, observing that reproduces satisfactorily the GE-experimental values at all temperatures.