Enthalpies of mixing and intermolecular interactions in N,N-dimethylformamide-chloroform systems at temperatures ranging between 288 and 308 K

Abstract

The thermal effects of N,N-dimethylformamide (DMF) and chloroform (ChF) dissolution in the ChF-DMF system are calorimetrically determined at 288, 298, and 308 K over the range of compositions. The partial molar enthalpies of the components are also calculated, along with the values for the enthalpies of mixing. It is found that mixing is a strongly exothermic process and depends only slightly on temperature. The enthalpy parameters of double and triple interactions between DMF molecules in ChF, and between ChF molecules in DMF, are determined using virial expansions.