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
Law of corresponding states says that

The molar heat of energy of gas at constant volume should be nearly constant (about 3 calories)
No gas can be liquified above the critical temperature, howsoever high the pressure may be
The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at the critical temperature
, two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

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