The modified Soave-Redlich-Kwong equation of state (MSRKE) enables prediction of the bubblepoint pressure, oil-formation volume factor, gas-oil ratio, oil density, crude oil gravity, gas gravity ...

Comparisons to the Redlich-Kwong (RK) equation of state, which is considered the best two-constant-parameter equation of state, indicated that the MMM equation of state was more accurate.

How this law fails is also well understood (Van der Waals and Redlich-Kwong equations, etc.), which makes the Ideal Gas Law an ideal first approximation. ... Variables In The Ideal BDC Equation.