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@wikipedia


Equation of State for the Real Gas:

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

where

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body\rho

Gas density

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bodyp

Gas pressure

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bodyM

Gas molar mass

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bodyZ

Compressibility factor

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bodyT

Gas temperature

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bodyR

Gas constant


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


The 
Compressibility factor 

LaTeX Math Inline
bodyZ(p, T)
 pressure-temperature dependence is usually modelled through the reduced properties
LaTeX Math Inline
bodyZ(T_r, p_r)
, where:

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bodyT_r = T/T_c

Reduced Temperature

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bodyT_c

Сritical temperature

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bodyp_r = p/p_c

Reduced Pressure

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bodyp_c

 Critical pressure

 


Below is the list of the most popular correlations for Compressibility factor 

LaTeX Math Inline
bodyZ(T_r, p_r)
:


See also


Natural Science / Physics / Thermodynamics / Equation of State

Real Gas ]

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