H. Kirss et al., EXCESS-ENTHALPIES FOR THE TERNARY MIXTURES PHENOL-1-HEXANOL-N-HEPTANEAND PHENOL-CYCLOHEXANOL-N-HEPTANE, AND THEIR CONSTITUENT BINARIES AT 318.15 K, Thermochimica acta, 265, 1995, pp. 45-54
Excess molar enthalpies H-E as a function of composition for the two t
ernary systems, phenol-1-hexanol-n-heptane and phenol-cyclohexanol-n-h
eptane, and five constituent binaries have been measured with a Calvet
-type microcalorimeter at 318.15 K. All the excess enthalpies of binar
y systems containing n-heptane are positive, including those for a par
tially miscible system, phenol-n-heptane. The H-E values of phenol-alc
ohol systems are negative. The results have been used to predict terna
ry H-E data by the UNIFAC model and a version of this, the UNIFAC(3Q),
both with enthalpy-fitted interaction parameters. It was found that t
he models could only qualitatively predict the ternary H-E values.