EXCESS-ENTHALPIES OF (N,N-DIMETHYLFORMAMIDE OR N,N-DIMETHYLACETAMIDE PLUS HEXANE OR BENZENE OR TOLUENE OR P-XYLENE OR MESITYLENE)

The excess molar enthalpies HEm of (N,N-dimethylformamide or N,N-dimethylacetamide + hexane, at 313.15 K, or + benzene or toluene or p-xylene or mesitylene, at 303.15 K) have been determined experimentally as a function of mole fraction. (N,N-dialkylamide + hexane) shows partial miscibility. HEm is positive except for (N,N-dimethylformamide + benzene). HEm(N,N-dimethylamide + an aromatic hydrocarbon) show a remarkable exothermic effect relative to hexane mixtures. © 1992 Academic Press Limited All rights reserved.