Excess enthalpy data for seven binary systems at temperatures between 50 and 140 degrees C

Experimental excess enthalpies for the following seven systems have been de termined with the help of isothermal flow calorimetry: benzene + cyclohexan e at 50, 90, and 140 degreesC, heptane + diethyl carbonate at 100 and 140 d egreesC, hexane + dimethyl carbonate at 90 degreesC, dimethyl carbonate + h eptane at 90 and 140 degreesC, perfluoro-2-methylpentane + benzene at 50, 9 0, and 140 degreesC, 1,2-epoxybutane + methanol at 90 and 140 degreesC, and 1,2-expoxybutane + 2-ethyl-1-hexanol at 90 and 140 degreesC. The experimen tal H-E values have been used for the revision and extension of the group c ontribution method Modified UNIFAC (Dortmund). The predicted results are in good agreement with the experimental data.