Thermodynamics of molecular interactions of 1,2-dibromoethane + aromatic hydrocarbon mixtures at 308.15K

546-551The excess volumes and enthalpies of mixing of binary mixtures of 1,2-dibromoethane with benzene, toluene, o-xylene, m-xylene and p-xylene have been measured experimentally over the whole composition range at 308.15K. The data have been explained qualitatively on the basis of electron-donor/ acceptor interactions between 1,2-dibromoethane and the aromatic hydrocarbons and also in terms of the loss of favourable orientational order of the pure components. Flory's theory is not able to predict correctly the VE and HE values of systems studied. However, the Sanchez and Lacombe. Theory correctly predicts the change of sign of HE values with change of mole fraction. Calculated HE by this theory is of the same order as experimental HE. Calculated VE values show relatively poor agreement with the corresponding experimental VE values