A Self-Consistent Technique for the Construction and Evaluation of the Three-Parameter Corresponding States Principles

A self-consistent approach for the evaluation of the existing three-parameter corresponding states principles of non-polar fluids and the calculation of the corresponding states parameters is presented. This self consistent approach is based upon the assumption that the contribution of the third parameter to the thermophysical properties is much smaller than the contributions of the first two parameters which are generally the molecular energy and length parameters, e/k and s. Based on this self- consistent approach several existing three-parameter corresponding states principles of non-polar fluids are evaluated. It is shown that the three-parameter corresponding states principle based on the two-and three-body intermolecular potential parameters effectively satisfies the requirements of the present selfconsistent technique. The corresponding states principle parameters of normal hydrocarbons are calculated through the present technique and they are reported here.