The Reduced Properties calculator provides access to several state variables of a fluid and includes the compressibility factor, providing as a set the basis for a theorem of corresponding states.

Equations in the Reduced Properties Calculator:

• Reduced Pressure - the ratio of the measured actual pressure to the substance's critical pressure
• Reduced Temperature - the ratio of the measured actual temperature to the substance's critical temperature
• Pseudo-reduced Specific Volume - the ratio of the measured actual volume to the volume computed from the Ideal Gas Law
• Compressibility Factor - the ratio of the molar volume of a gas to the molar volume of an ideal gas at the same temperature and pressure

NOTES

In thermodynamics, the reduced properties of a fluid are a set of state variables normalized by the fluid's state properties at its critical point. These dimensionless thermodynamic coordinates, taken together with a substance's compressibility factor, provide the basis for the simplest form of the theorem of corresponding states.^[1]

Reduced properties are also used to define the Peng–Robinson equation of state, a model designed to provide reasonable accuracy near the critical point.^[2] They are also used to critical exponents, which describe the behavior of physical quantities near continuous phase transitions.^[3]

REFERENCE

[1] Reduced properties
Source: Wikipedia
URL: https://en.wikipedia.org/wiki/Reduced_properties
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