Acentric Factor Calculator - Measure of Non-sphericity of Molecules

Posted by Dinesh on

Use this thermodynamics calculator to calculate measure of the non-sphericity (centricity) of molecules using acentric factor equation.

Values of some common gases
MoleculeAcentric Factor
Acetylene0.187
Ammonia0.253
Argon0.000
Carbon Dioxide0.228
Decane0.484
Helium-0.390
Hydrogen-0.220
Krypton0.000
Neon0.000
Nitrogen0.040
Nitrous Oxide0.142
Oxygen0.022
Xenon0.000

Acentric Factor Calculation

Formula:

? = - log10(Prsat) - 1, at Tr = 0.7

where,
Prsat - reduced saturation vapor pressure
Tr - reduced temperature
? - acentric factor