化学学报 ›› 1996, Vol. 54 ›› Issue (10): 966-971. 上一篇    下一篇

研究论文

微扰理论非原始模型用于1:1价单一电解质水溶液

丛威;陆九芳;李以圭   

  1. 清华大学化学工程系
  • 发布日期:1996-10-15

Application of perturbation theory of non-primitive model to single electrolyte solutions

CONG WEI;LU JIUFANG;LI YIGUI   

  • Published:1996-10-15

本文采用微扰理论非原始模型, 以带电硬球混合物为参考体系, 考虑粒子间各种作用能(色散、静电、偶极、四极、诱导), 首次取相对介电常数为1, 拟合了12处1:1价电解质水溶液的渗透系数, 获得了成功, 得到了7种1价离子Na^+,K^+, Rb^+, Cs^+, Cl^-, Br^-, I^-的微观参数(软球直径σ和色散能常数ε/k)。计算得到的电解质水溶液渗透系数的总平均绝对偏差是0.041。这些离子的微观参数在不同体系中维持不变。计算中未引入混合参数。

关键词: 电解质, 微扰论, 渗透系数, 非原始模型, 微观参数

The non-primitive model of perturbation theory with the mixture of charged hard spheres as reference system is used to correlate the osmotic coefficients of twelve 1:1 electrolyte solutions. The various interaction energies between particles (dispersion, electrostatic, dipole, quadrupole and induced dipole) are considered. The relative dielectric constant is put into unity. The parameters of seven ions (Na^+, K^+, Rb^+, Cs^+, Cl^-, Br^-, I^-) are obtained. The total average absolute deviation between calculated and experimental values of osmotic coefficients is 0.041. The ionic parameters can keep contant in different systems. No mixing parameters are introduced in the calculations.

Key words: ELECTROLYTE, PERTURBATION THEORY, OSMOTIC COEFFICIENT

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