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本文从电解质溶液理论出发,推导出了在任意温度与浓度条件下溴化锂水溶液的平均活度系数的计算表达式。将此表达式代入 Gorden 半经验公式,就得到了计算在任意温度与浓度条件下溴化锂水溶液分子扩散系数的计算公式。由该计算公式算出的溴化锂水溶液分子扩散系数,与T.Kashiwagi 等采用全息干涉法所测初步结果完全吻合,说明本文推导的公式(10)、(16)和(17)是可信的。
Based on the theory of electrolyte solution, this paper deduces the expression of the average activity coefficient of lithium bromide aqueous solution at any temperature and concentration. By substituting this expression into the semi-empirical formula of Gorden, the formula for calculating the molecular diffusion coefficient of lithium bromide aqueous solution at any temperature and concentration is obtained. The calculated molecular diffusion coefficient of lithium bromide solution is in good agreement with the preliminary results measured by holographic interference method by T. Kashiwagi et al., Which shows that the formulas (10), (16) and (17) deduced in this paper are credible.