Abstract
In order to investigate the effects of hydrogen-bonding on thermodynamic excess properties in alcohol-nonpolar liquid solutions, the self-associations of ethanol in carbon tetrachloride, n-hexane and cyclohexane, and of methanol in carbon tetrachloride at 15°, 25°, and 35°C are studied by infrared spectroscopy. The spectroscopic data obtained for these systems can be interpreted by the monomer-cyclic tetramer model of alcohol, and also by the continuous chain association model of alcohol, under the assumption of athermal associated mixtures. The association constants and association energies of these alcohols are determined on the basis of these models.
By the comparisons of the excess free energy, GE, and activity coefficient, γi between the experimental values and the ones calculated by these two models, it is shown that the continuous chain association model gives better agreement than the cyclic tetramer model does.
