电解质-非电解质-水体系溶解度的热力学关联

Study on the Thermodynamics of the Electrolyte-nonelectrolyte Mixed Aqueous Solution

通过计算电解质水溶液的过剩自由焓 GEXW、非电解质水溶液的过剩自由焓 GEXS 及电解质从电解质水溶液转移到非电解质水溶液中的转移自由焓 ΔGEXtr ,建立了一个通用的电解质 -含水混合溶剂体系的热力学模型 ,适用于非电解质浓度较高的体系 .并应用该模型对一些体系的相平衡数据进行了关联 。

On the basis of the excess free energy changes of the electrolyte solution G\+\{EX\}\-W and the non electrolyte solution G\+\{EX\}\-s and that of the transference from the electrolyte solution to nonelectrolyte solution ΔG\+\{EX\}\-\{tr\} and their respective expressions,the general thermodynamic model of the electrolyte non electrolyte mixed aqueous solution were developed. Thereby it can be used to the system containing high concentration non electrolyte components. With the model,the activity coefficients of all components can be evaluated, and the solubilities of some systems calcuated. The predicted solubilities agree well with experimental data.