Gas Compressibility Factor

The gas compressibility factor, abbreviated as Z, a dimensionless number, is a factor independent of the quantity of gas and determined by the character of the gas, the temperature, and pressure.

• See specific gas constant value

 

Gas compressibility factor formula
\(\large{ Z = \frac{p \; V}{n \; R \; T}  }\)
Symbol	English	Metric
\(\large{ Z }\) = gas compressibility factor	\(\large{ dimensionless }\)
\(\large{ n }\) = number of moles	\(\large{ dimensionless }\)
\(\large{ p }\) = pressure	\(\large{\frac{lbf}{in^2}}\)	\(\large{Pa}\)
\(\large{ R }\) = specific gas constant	\(\large{\frac{lbf-ft}{lbm-R}}\)	\(\large{\frac{J}{kg-K}}\)
\(\large{ T }\) = temperature	\(\large{F}\)	\(\large{K}\)
\(\large{ V }\) = volume	\(\large{ft^3}\)	\(\large{m^3}\)