非理想气体的逸度因子和非理想溶液的活度系数

对单组分非理想气体,推导了它的逸度因子的微分方程式。对多组分非理想气体,推导了各组分逸度因子满足的微分方程式,定义了一个总逸度因子,并找到了总逸度因子和各组分逸度因子之间的关系。同样,对非理想溶液,推导了各组分活度系数满足的微分方程式,定义了非理想溶液的总活度系数,并找到了两者满足的关系。最后分析了逸度因子和活度系数之间的异同点。

The Fugacity Coefficient of Non-ldeal Gas and Activity Coefficient of Non-ldeal Solution

A differential equation for the fugacity coefficient of the single-component non-ideal gas is derived. As for the multi-component non-ideal gas, differential forms for each component are also derived. A total fugacity coefficient is defined for this mixed non-ideal gas and its relationship with the fugacity coefficient of each component is obtained. In the similar way, the activity coefficients of each component of the non-ideal solution are derived, a total activity coefficient of the non-ideal solution is defined and its relationship with the activity coefficient of each component is also obtained. Comparisons between the expressions of the fugacity coefficient and activity coefficient are made finally and discussed in details.