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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:

LaTeX Math Inline
bodyT_r = T/T_c

Reduced Temperature

LaTeX Math Inline
bodyT_c

Сritical temperature

LaTeX Math Inline
bodyp_r = p/p_c

Reduced Pressure

LaTeX Math Inline
bodyp_c

 Critical pressure

 


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

LaTeX Math Inline
bodyZ(p, TT_r, p_r)
:


Peng–Robinson EOS @model
Soave-Redlich-Kwong (SRK) EOS @model 

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