Discussion :: Chemical Engineering Thermodynamics
- Pick out the wrong statement.
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A.
Activity co-efficient is dimensionless |
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B.
In case of an ideal gas, the fagacity is equal to its pressure |
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C.
In a mixture of ideal gases, the fugacity of a component is equal to the partial pressure of the component |
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D.
The fugacity co-efficient is zero for an ideal gas |
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Answer : Option D
Explanation :
Fugacity coefficient is defined as ratio of fugacity of the substance at the prevailing conditions to the fugacity at standard conditions (usually the conditions where the fugacity is known is taken as standard conditions) For ideal gas since fugacity is equal to pressure The ratio becomes equal to 1.
Actually the definition becomes fugacity coefficient=fugacity of the gas at some conditionfugacity of the gas at standard condition if the standard conditions are taken as the same conditions in which the ideal gas is present the equation becomes ratio of pressure and hence equal to one.
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