화학공학소재연구정보센터
Thermochimica Acta, Vol.524, No.1-2, 35-38, 2011
Dependence of enthalpies of dissolution of beta-alanyl-beta-alanine on the composition of (water plus alcohol) mixtures at 298.15 K
The dissolution enthalpies of beta-alanyl-beta-alanine in aqueous methanol, ethanol, 1-propanol and 2-propanol solutions with an alcohol content up to 0.4 mole fractions have been measured calorimetrically at T = 298.15 K. The standard enthalpies of dissolution, Delta(sol)H degrees and transfer, Delta(tr)H degrees, of beta-alany1-beta-alanine from water into mixed solvents and the enthalpy coefficients of pair-wise interactions, h(xy), of beta-alanyl-beta-alanine with alcohol solvent molecules have been calculated. The results are discussed in terms of solute-solute and solute-solvent interactions. (C) 2011 Elsevier B.V. All rights reserved.