EXACT LIMITS OF MIXTURE PROPERTIES AND EXCESS THERMODYNAMIC FUNCTIONS

Deviations from ideal mixture behavior is caused by asymmetry in molec ular characteristics, rather than the state of the mixture. Therefore, in this work a set of exact limits for mixture properties and excess thermodynamic functions are derived in terms of molecular variables. T hese molecular parameter limits are expressible in terms of the pure c omponent properties. The utilization of the limits is demonstrated by testing some common mixing rules and excess Gibbs energy models. The n ew limits can be used to test other models, improve existing ones, and suggest ways of developing new consistent models. (C) 1998 Published by Elsevier Science Ltd.