EQUATIONS OF STATE FOR HYDROGEN-BONDING SYSTEMS

Considerable progress has been made over the last two decades in the m odeling of hydrogen bonding fluids. Traditionally, the properties of h ydrogen bonding solutions have been predicted and correlated using lat tice models to give activity coefficients. Recently, several equations of state have been developed which can be used to predict activities and other configurational properties. This paper presents an overview of the specific types of chemical interactions that can be treated, th e mathematical methods used to treat hydrogen bonding, and the similar ities and differences in the underlying equations of state that are us ed to treat the ''van der Waals'' repulsive and attractive forces. Com parisons are made between chemical theories, quasichemical theories, a nd perturbation theories, including discussions on APACT, Panayiotou-S anchez-Lacombe, and the SAFT equation.