@wikipedia


Equation of State for the Real Gas:

\rho(p, T) = \frac{1}{Z} \cdot \frac{M}{R} \cdot \frac{p}{T}

where

Gas density

Gas pressure

Gas molar mass

Compressibility factor

Gas temperature

Gas constant


Despite the name it covers a lot of medium-density liquids as well.


The 
Z-factor  of pure substances is usually modelled through the reduced fluid properties

Reduced Temperature

Сritical temperature

Reduced Pressure

Critical pressure



The 
Z-factor  of fluid mixtures is usually modelled through the pseudo-reduced fluid properties

Reduced Temperature

Pseudo-critical temperature

Reduced Pressure

Pseudo-critical pressure


Below is the list of the most popular Real Gas EOS @models: 

Peng–Robinson-Stryjek-Vera (PRSV) EOS @model
Peng–Robinson (PR) EOS @model
Soave-Redlich-Kwong (SRK) EOS @model 


See also


Natural Science / Physics / Thermodynamics / Thermodynamic system Equation of State /  Real Gas

Ideal Gas EOS @model ][ Soave-Redlich-Kwong (SRK) EOS @model ][ Peng–Robinson EOS @model ] 

Reduced Fluid Properties ][ Pseudo-Reduced Fluid Properties ]