Y. Demirel, CALCULATION OF EXCESS ENTROPY FOR BINARY-LIQUID MIXTURES BY THE NRTL AND UNIQUAC MODELS, Industrial & engineering chemistry research, 33(11), 1994, pp. 2875-2878
Isothermal excess entropy data for 23 binary liquid mixtures were calc
ulated using the excess Gibbs energy and excess enthalpy correlations
obtained from the local composition models of NRTL and UNIQUAC. The mi
xtures include highly nonideal, associating, and partially miscible sy
stems. Temperature-dependent parameters of the models were used in the
calculations. The experimental data of excess Gibbs energy and excess
enthalpy, which were base of excess entropy data, covers the temperat
ure range of 288.15-358.15 K. The average absolute relative deviations
of the excess entropy data calculations were obtained as 7.34 and 8.5
1% for the NRTL and UNIQUAC models, respectively. Excess entropy data
at isobaric conditions were also calculated using excess heat capacity
data for eight binary liquid mixtures in the range of 238.15-318.15 K
. Temperature-dependent parameters estimated directly from excess heat
capacity data were used in the calculations which gave the average ab
solute relative deviations of 10.91 and 12.76% for the NRTL and UNIQUA
C models, respectively.