Computing Excess Thermodynamic Properties Using the Wilson Model

temperature

344.

e

G

/ R T

e

H

/ R T

e

S

/ R

e

C

p

/ R

excess functions

comparison with Castier's data at 344 K

Consider a binary mixture of acetone and water. The Wilson model is used to predict several dimensionless excess thermodynamic properties, such as the Gibbs free energy,

e

G

RT

, enthalpy,

e

H

RT

, entropy,

e

S

R

, and heat capacity,

e

C

p

R

.

This Demonstration plots these four thermodynamic properties for selected values of temperature. A comparison with a calculation done by Dr. Marcelo Castier at

T=344K

is also shown, in good agreement for all the computed excess functions.