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FUGACITY

The FUGACITY function returns the fugacity of the specified pure fluid for the given conditions. Fugacity is defined by the following relation:

where

 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.

Example:

    R$='Argon'

    $UnitSystem SI K kPa

    f=FUGACITY(R$,T=100 [K],P=101.3 [kPa])

{Solution:  f=99.04 kPa}

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