The dissolution enthalpies of L-proline in aqueous solution of formamide, N-methylformamide and N,N-dimethylacetamide with a mole-fraction of amides from x(2) = (0 to 0.35) have been measured at T = 298.15 K. The results obtained have been used to calculate the standard enthalpies (Delta H-sol degrees) and transfer (Delta H-tT degrees) of L-proline from water into mixtures as well as the enthalpy coefficients of pairwise interaction (h(xy)) of the solute with amide in aqueous solutions. The interdependence between enthalpy characteristics of L-proline dissolution (transfer) and the composition of (water + amide) mixtures has been established. Comparison of the resulting data with those obtained earlier for L-phenylalanine and L-tryptophan in the same mixed solvents at 298.15 K has been made.
