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CompressibilityFactor returns the compressibility factor of a fluid, which is often represented as Z. The compressibility factor is the ratio of the specific volume of the fluid to the specific volume it would have at the same temperature and pressure if the fluid obeyed the ideal gas law.
Two arguments are required for all pure substances; three are needed for moist air (AIRH2O).
$UnitSystem SI K MPa
Z=CompressibilityFactor(Nitrogen, T=300 [K],P=10 [MPa])
The calculated value is Z=1.005 at these conditions.
The list of property identifiers needed in the calling arguments and instructions are available in the Thermophysical Function help.