Excess enthalpies of binary mixtures of N,N-dimethylformamide with substituted benzenes at 298.15 K

The excess molar enthalpies HE of binary solvent mixtures of N,N-diemthylformamide with toluene, ethylbenzene, chlorobenzene, bromobenzene, nitrobenzene and aniline have been measured with a new paar 1451 solution calorimeter at 298.15 K over the entire range of composition. The experimental values of HE are positive in the mixtures of N,N-dimethylformamide with toluene and ethylbenzene over the entire range of composition. The values of HE are negative over the whole range of composition in the mixtures of N,N-dimethylformamide with chlorobenzene, bromobenzene, nitrobenzene and aniline. The results are discussed with regard to the associating abilities of the components.