Chemical Engineering Thermodynamics
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.

Margules
Gibbs-Duhem
Gibbs-Helmholtz
Van Laar

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Chemical Engineering Thermodynamics
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

Solubility increases as temperature increases
Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution
Solubility increases as temperature decreases
Solubility is independent of temperature

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