Modeling of thermodynamic properties of multi-component electrolyte solutions
来源期刊：中国有色金属学报(英文版)2001年第3期
论文作者：方正 方圆 张全茹 李元高
文章页码：425 - 429
Key words：activity； electrolyte； solution； model； interchange energy
Abstract: An empiric equation, GH2Oex/(1-x(H2O))2=α+β·x(H2O)/ln(x(H2O)), representing the relation between the excess free energy GH2Oex and mole fraction of water x(H2O) in binary electrolyte solution, was developed and the parameters α and β in the equation were determined by fitting the experimental data for some binary aqueous systems of electrolytes such as CuCl2, NiCl2, HCl, NaCl, KCl, CaCl2 and BaCl2. The activities of water in such ternary and multi-component systems composed of 7 binaries as HCl-H2O-CuCl2, HCl-H2O-NiCl2, HCl-H2O-NaCl, NaCl- H2O-KCl, NaCl- H2O-CaCl2, KCl-H2O-CaCl2, NaCl-H2O-BaCl2, KCl-H2O-CaCl2 and NaCl-H2O-KCl-BaCl2 were predicted by a simplified sub-regular solution model developed by authors from the corresponding binary systems. The predicted results are in good agreement with the measured ones.
