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The FUGACITY function returns the fugacity of the specified pure fluid for the given conditions. Fugacity is defined by the following relation:
f is fugacity (same units as pressure)
P is pressure
v is the specific volume of the fluid
T is the absolute temperature
R is the gas constant.
For an ideal gas fluid, f is identical to P.
The FUGACITY function will accept any appropriate set of inputs. Fugacity is particularly useful for some types of phase equilibrium calculations.
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