Excess Enthalpies of Binary Mixtures of Formamide with Secondary Amides

The excess molar enthalpies H^E of binary mixtures of formamide with N-methylformamide, N-ethylformamide, N-methylacetamide, N-ethylacetamide and N-methylpropion-amide have been measured as functions of the mole fraction at 308.15 K, using an isoperibol rotating calorimeter. The experimental values of H^E are negative for all mixtures over the whole composition range. Intermolecular interactions in these mixtures are discussed through comparison of the results with those for corresponding binary mixtures of water. This revised version was published online in August 2006 with corrections to the Cover Date.