Excess molar enthalpies HE were measured using a microcalorimeter for binary liquid mixtures of dibromomethane (CH2Br2) + cyclohexanone, and dichloromethane (CH2Cl2) + cyclohexanone or + pyrrolidin-2-one at T= 303.15 K. The values of HE are negative for all systems. The excess partial molar enthalpies of the components HEm,1 and HEm,2 were calculated from HE data. The results were interpreted in terms of specific interactions.

Excess molar enthalpies have been determined for binary liquid mixtures of dibromomethane (CH2Br2) (DBM) with acetonitrile, furan, acetophenone and tetrahydrofuran at 313.15 K. The excess molar enthalpies are endothermic for the systems CH2Br2 + acetonitrile, and + furan whereas exothermic for the system CH2Br2 + acetophenone and + tetrahydrofuran over the whole composition range. The results were fitted with the Redlich-Kister equation by means of the least square method. These results indicate the existence of specific interactions between all these components.Excess molar enthalpies, H E , were measured by means of a heat flux micro calorimeter [5] (C-80 model from Setaram, France), whose temperature was