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2. Thermodynamic properties of real fluids
2.1 Notion of transience
The fugacity f
A
of a pure gaseous body A (or of body A in a gaseous mixture) replaces the real pressure to express the difference in behavior of the gas or gaseous mixture compared to the perfect gas. The fugacity has the dimension of a pressure, and the fugacity/pressure ratio is called the fugacity coefficient:
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Thermodynamic properties of real fluids
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