Simultaneous correlation of activity coefficient and partial thermal properties for electrolyte solutions using a model with ion-specific parameters (original) (raw)

1993, Fluid Phase Equilibria

The Liu-Harvey-Prausnitz model (1989a) for electrolyte solutions with ion-specific parameters is extended to simultaneously correlating the mean ionic activity coefficient data for 55 aqueous electrolytes including the H,SO,/H,O system up to the H,SO, concentration of 76 m. With only 1.6 adjustable parameters per aqueous electrolyte, an excellent agreement between the calculated values and the experimental data has been achieved. Ion-specific parameters are reported for 9 cations (H ', Li+, Na+, K+, Rb+,Cs+,Mg++,Ca++andZn++)andS anions (F-,Cl-, Br-, I-, OH-, NO;, CNS-and SO;-1. The results in this work are compared with those given by the Haghtalab-Vera model (1988) and the outcome is in favor of the Liu-Harvey-Prausnitz model.