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Citation: CHEN Fei-Wu, Gu Cong Qian, Wei-Lan, Li Xu-Qin. The Fugacity Coefficient of Non-Ideal Gas and Activity Coefficient of Non-Ideal Solution[J]. University Chemistry, ;2017, 32(8): 66-70. doi: 10.3866/PKU.DXHX201701025 shu

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

Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China

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.
- Non-ideal gas,
- Non-ideal solution,
- Fugacity,
- Fugacity coefficient,
- Activity,
- Activity coefficient
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