FLUIDS OF PSEUDO-HARD BODIES - II - REFERENCE MODELS FOR WATER, METHANOL, AND AMMONIA

Pseudo-hard body fluids resulting from extended primitive models of wa ter, methanol, and ammonia have been investigated both by computer sim ulations and theory for a number of geometrical parameters. It is show n that none of the existing equations of state and integral equations for the site-site correlation functions is able to describe the proper ties of the pseudo-hard body fluids reasonably accurately. For the equ ation of state an accurate semi-empirical method is proposed and for t he site-site correlation functions the reference average Mayer functio n perturbation theory has been found to perform at least qualitatively correctly, which is not the case with Ornstein-Zernike equation based theories.