On the Veytsman statistics as applied to non-random lattice fluid equations of state

Thermodynamic properties of hydrogen-bonding (HB) lattice fluids have been represented by superposing Veytsmann statistics to physically interacting l attice models. In the present work the validity of the superposition was qu estioned. The normalization of Veytsman statistics was proposed to properly represent HB effect for use with physical interaction models. Also to circ umvent the difficulties associated with the solution of a set of non-linear equations representing the number of HB pairs, an expansion method was pro posed for explicit computation. This expansion together with You et al.'s e xplicit non-random lattices fluid model for physical interactions constitut es a complete explicit model. The applicability of the explicit model was i llustrated for vapor-liquid equilibria of pentane-pentanol mixture. (C) 200 1 Elsevier Science B.V. All rights reserved.