Abstract
The concentrations of various alcohols in ethanol-n- heptane and ethanol-toluene solutions over the temperature range of 20-50$ were determined from an analysis of infrared spectral data in the frequency range of the hydroxyl stretching mode and by using heat-of-mixing data. With this analysis, it was possible to determine the portion of the heat-of-mixing that resulted from hydrogen-bond rupture. By using these results, the hydrogen-bond energy was found to be about 5.2 kcal/mole of bonds, and the interaction energy between the hydroxyl and the pi electrons of toluene was about 2.0 kcal/mole of bonds. The infrared spectral analysis method used did not provide suitable data for the calculation of Gibbs free energy and entropy. (12 refs.)
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