Thermochemistry of the solution of β-alanine in (H2O + alcohol) mixtures at 298.15 K

被引：9
|
作者：
Smirnov, Valeriy I. [1 ]
Badelin, Valentin G. [1 ]
机构：
[1] Russian Acad Sci, GA Krestov Inst Solut Chem, Lab Thermodynam Solut Nonelectrolytes & Biol Act, Ivanovo 153045, Russia
来源：
THERMOCHIMICA ACTA | 2013年 / 565卷
关键词：
Amino acids; H2O; Alcohols; Enthalpy of solution; Enthalpy of transfer; Mixed solvent; ALCOHOL BINARY SOLVENTS; ALPHA-ALANINE; ENTHALPIES; ACID; DL; DERIVATIVES; MIXTURES; ALKANOLS; SYSTEMS;
D O I：
10.1016/j.tca.2013.05.012
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The enthalpies of the solution of beta-alanine in H2O + (methanol, ethanol, 1-propanol and 2-propanol) mixtures with alcohol content up to 0.4 mol fractions, have been determined calorimetrically at T = 298.15 K. The standard enthalpies of the solution and transfer of beta-alanine from water to aqueous alcohol have been calculated. The effect of structure properties of a mixed solvent on specified enthalpy characteristics of P-alanine is discussed. The enthalpy coefficients of pairwise interactions between beta-alanine and alcohol molecules have been computed. It has been found that these coefficients become increasingly positive in methanol, ethanol, 1-propanol, and 2-propanol sequence. A comparative analysis of thermodynamic characteristics of dissolution of beta-alanine and D,L-alpha-alanine in the mixtures studied has been made. Published by Elsevier B.V.
引用
收藏
页码：202 / 204
页数：3
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