Abstract
This paper presents the theoretical prediction of second, third and fourth virial coefficients of linear hard chain molecules employing equations of state. The equations of state are determined through statistical associating fluid theory (SAFT). Two improvements of SAFT theory as SAFT-Dimer and SAFT-Trimer are employed to determine the virial coefficients. The SAFT-Trimer model predicts the virial coefficients much closer to the pearl-necklace model in comparison to the SAFT-Dimer model, concluding thereby that the SAFT-Trimer model seems more flexible in comparison to that of the dimer model.
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