Enthalpy characteristics of the dissolution and solvation of crystalline L-proline in water-ethanol mixtures at 298.15 K

摘要

Heats of solution of L-proline in water-ethanol mixtures at ethanol mole fractions in the range 0.00 < X _(EtOH) < 0.70 are measured at 298.15 K via calorimetry. Standard enthalpies of solution of proline in water and water-alcohol mixtures are calculated and analyzed. Enthalpy coefficients of pair and triple acid-alcohol interactions in water at low alcohol concentrations are calculated in terms of the McMillan-Mayer theory. The obtained enthalpy characteristics are compared to those for previously investigated proline-containing water-alcohol systems.