Excess Enthalpy Data for Seven Binary Systems at Temperatures between 50 and 140 °C

Experimental excess enthalpies for the following seven systems have been determined with the help of isothermal flow calorimetry:  benzene + cyclohexane at 50, 90, and 140 °C, heptane + diethyl carbonate at 100 and 140 °C, hexane + dimethyl carbonate at 90 °C, dimethyl carbonate + heptane at 90 and 140 °C, perfluoro-2-methylpentane + benzene at 50, 90, and 140 °C, 1,2-epoxybutane + methanol at 90 and 140 °C, and 1,2-expoxybutane + 2-ethyl-1-hexanol at 90 and 140 °C. The experimental HE values have been used for the revision and extension of the group contribution method Modified UNIFAC (Dortmund). The predicted results are in good agreement with the experimental data.