Concentration and temperature dependence of heats of mixing of 1-butanol, 2-butanol, and 2-methyl-2-propanol with cyclohexane

Abstract

The concentration dependences of excess enthalpies were measured in an isothermal calorimeter within the range of 25-50 °C at six temperatures for the binary systems 1-butanol-cyclohexane and 2-butanol-cyclohexane and at five temperatures for the system 2-methyl-2-propanol-cyclohexane. A conspicuous temperature and concentration dependence of the maximum value of enthalpy of mixing was found for the latter system. Heats of mixing of all three systems were correlated by the SSF equation. The results of correlation are comparable with the experimental error (0.5%) in the entire range of mole fractions of alcohols.