Fugacity Coefficient Formula:
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Definition: The fugacity coefficient is the ratio of fugacity to the pressure of that component, measuring the deviation from ideal gas behavior.
Purpose: It's used in thermodynamics to calculate the real behavior of gases, especially at high pressures or low temperatures.
The calculator uses the formula:
Where:
Explanation: The difference between real and ideal Gibbs energies, normalized by RT, gives the natural logarithm of the fugacity coefficient.
Details: Fugacity coefficients are crucial for accurate phase equilibrium calculations, chemical reaction equilibria, and process design in chemical engineering.
Tips: Enter the Gibbs Free Energy (G), Ideal Gas Gibbs Free Energy (Gig), and Temperature (T). Temperature must be > 0K.
Q1: What does a fugacity coefficient of 1 mean?
A: A value of 1 indicates ideal gas behavior. Values ≠ 1 show deviations from ideality.
Q2: When is this calculation most important?
A: For high-pressure systems, mixtures, or when precise phase equilibrium calculations are needed.
Q3: How do I obtain G and Gig values?
A: These are typically calculated from equations of state or thermodynamic models.
Q4: What's the range of typical values?
A: For most systems, φ ranges between 0.1 and 10, but extreme conditions can produce values outside this range.
Q5: Can this be used for liquid phases?
A: Yes, the concept applies to all phases, though calculation methods differ for liquids.