Enthalpies of dilution of glycine, l-alanine and l-serine in aqueous ethylene glycol solutions at 298.15 K

Enthalpies of dilution of glycine, l-alanine and l-serine in aqueous ethylene glycol solutions have been measured at 298.15 K by a mixing-flow microcalorimeter. The homogeneous enthalpic interaction coefficients of the three zwitterions have been computed by least-squares fitting on the basis of the McMillan–Mayer theory. The variations of the enthalpic pairwise interaction coefficients with the mass fraction of ethylene glycol in mixtures are interpreted in terms of solute–solute and solute–solvent interactions.