MX-NX_2和MX-NX_3电解质水溶液的热力学研究

Studies on Thermodynamics of MX-NX2 and MX-NX_3 Aqueous Electrolyte Solutions

本文用Pitzer方程研究相同阴离子的非对称性混合电解质溶液的热力学性质,讨论了高次静电项(~Eθ_(ij)、~Eθ′_(ij))所产生的效应。引入混合参数(θ_(ij))和离子强度(Ⅰ)的关系式,估算了25℃时MX-NX_2和MX-NX_3电解质水溶液的Pitzer混合参数~Sθ_(ij)^(0)、~Sθ_(ij0^(1)和φ_(ij)k,其计算值和文献值吻合。

The effects of the higher-order electrostatic terms on the thermodynamic properties of unsymmetrically mixed electrolytes with identical ion were investigated in the evaluation of the Pitzer mixing parameters, and the relationship between mixing parameter(θij) and ionic strength (I) was used in the evaluation. The Pitzer mixing parameters , and were evaluated for MX-NX2 and MX-NX3 aqueous electrolyte solutions at 25℃. The calculation results are in good consistent with reference data.