EXCESS-ENTHALPIES OF 3-METHYLPHENOL-N-HEPTANE, 3-METHYLPHENOL-PHENOL-N-HEPTANE AND 3-METHYLPHENOL-1-HEXANOL-N-HEPTANE AT 318.15 K

Excess molar enthalpies HE for two ternary systems, 3-methylphenol-phe nol-n-heptane and 3-methylphenol-l-hexanol-n-heptane and a constituent binary 3-methylphenol-n-heptane have been measured with Calvet-type m icrocalorimeter at 318.15 K. For predicting ternary excess enthalpies, the modified Redlich-Kister equation was used. It has been shown that the second ternary system exhibits regions of both exothermic and end othermic mixing, and due to the intricated interaction between phenols and alcohols predicting of ternary excess enthalpies with the Redlich -Kister equation is unsuccessful.