EQUATION FOR PREDICTING 3RD VIRIAL-COEFFICIENTS OF NON-POLAR GASES

An empirical correlation for calculating third virial coefficients of nonpolar gases is developed in agreement with the corresponding states theorem. This equation requires the use of a third parameter which can be estimated from molecular parameters. The method is reliable, even for systems where no experimental data are available. The extension to mixtures involves one interaction constant for all possible binary sets. Copyright © 1979 American Institute of Chemical Engineers