AcentricFactor
The acentric factor, w, is a thermodynamic property of a fluid that is commonly used in property correlations. It is defined by
w = -1.0 - log10(Psat/Pcrit)
where
Psat is the vapor pressure of the fluid at a temperature equal to 0.7 * Tcrit
Pcrit is the critical pressure
Tcrit is the critical temperature [R or K]
Thermophysical Property Functions