Thermodynamics of liquid mixtures of methane and ethene

Abstract

The total vapour pressure of liquid mixtures of methane and ethene has been measured as a function of composition at 103.94 and 115.77 K. The results have been used to estimate the excess Gibbs energy G^E at these temperatures. The volume of mixing V^E has been determined at 103.94 K and is found to be small and negative. In a comparison with the values of G^E obtained by other authors, an attempt was made to estimate the value of H^E, the molar enthalpy of mixing. The results are interpreted in the light of some simple theories of mixtures, suggesting that this is a case where the Lorentz rule of combination of collision diameters is valid.