One improvement on it has departure functions that account for non-ideal behavior.
It was used to predict the closed loop critical behavior between type III and V by Polishuk. One improvement on it has departure functions that account for non-ideal behavior. That improvement sought to increase the accuracy of vapor pressure, liquid density, and compressibility factor calculations, and was done by Peng and Robinson. The introduction of omega, the acentric factor of a species, was a modification of it made by Soave. It itself improved on its predecessor by proposing a temperature dependence for the attractive term, and like that predecessor, it retains the terms a and b for species-specific constants. More accurate than the van der Waals equation, for ten points, name this doubly eponymous equation of state.
It was used to predict the closed loop critical behavior between type III and V by Polishuk.
{Redlich-Kwong} equation