Chemical Engineering Thermodynamics
Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.

Decreases
Remains constant
Decreases exponentially
Increases

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Chemical Engineering Thermodynamics
The necessary and sufficient condition for equilibrium between two phases is

The pressure should be same in the two phases
The concentration of each component should be same in the two phases
The temperature of each phase should be same
The chemical potential of each component should be same in the two phases

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