The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the _____________ equation?
Correct answer: D. Gibbs-Duhem
- A. Margules
- B. Van Laar
- C. Gibbs-Helmholtz
- D. Gibbs-Duhem
Explanation
The Gibbs-Duhem equation relates changes in component chemical potentials or fugacities to composition at constant temperature and pressure. Van Laar and Margules are activity-coefficient models, not the general constraint equation.
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