Abstract
Results are given of measurements of the excess Gibbs energy of mixing at 45 °C of 2-methyl-1-propanol, 2-butanol and 2-methyl-2-propanol in benzene solution and of 1-propanol in n-hexane solution. Excess enthalpies of mixing are given for these three butanols in benzene solution at 25, 35, and 45 °C and in n-hexane solution at 25 or 27 and at 45 °C. Excess volumes of mixing are given for 1-propanol+ n-hexane at 25 °C. A comparison is made of the thermodynamic properties of the normal alcohols in benzene and n-hexane solution with the corresponding properties of the branched alcohol solutions. A simple model is proposed which qualitatively explains the changes which take place on varying the composition, temperature, solvent, and alcohol structure in these solutions.
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