Excess virial coefficients with application in data analysis

This paper presents the general expression for excess virial coefficients o f binary mixtures in the form of Bartlett's law. Imposing this expression i n data reduction to determine mixture virial coefficients provides thermody namically consistent evaluations of cross virial coefficients. Standard dat a reduction procedures do not provide values of the mixture and cross viria l coefficients that are both consistent and accurate. We illustrate this ne w technique by analyzing Burnett data and direct density measurements. In a ddition, we present the general expression for cross virial coefficients un der model solution behavior. (C) 1999 Elsevier Science B.V. All rights rese rved.