ENTHALPY OF IONIZATION OF AQUEOUS GLYCINIUM ION (+HGLY = H+ + GLY) AT 298-K, DEPENDENCE ON IONIC-STRENGTH, AND THERMODYNAMICS OF IONIZATION

被引：0

作者：

WU, CH

机构：

[1] Science Department (Chemistry), LaGuardia College, City University of New York, Long Island City, NY 11101

来源：

THERMOCHIMICA ACTA | 1990年 / 159卷

关键词：

D O I：

10.1016/0040-6031(90)80119-J

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Previous investigations have led to considerably different enthalpy values (3891-5983 J mol-1) for the first ionization of aqueous glycine (+ HGly = H+ + Gly) at T= 298.15 K. To resolve this uncertainty, new measurements of the enthalpy of solution of glycine in water and in excess dilute hydrochloric acid have been made. Results of these measurements lead to values of ΔHXXX1 = 4.1±0.1 kJ mol-1, and thence ΔSXXX1 = -131.2±0.3 J K-1 mol-1, for the first ionization of glycine at T= 298.15 K. It has been noted that there is an unusually large dependence of ΔH1 on the ionic strength of the solution. © 1990.

引用

页码：337 / 347

页数：11

共 21 条

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