Thermodynamic functions for the system ethanol+p-xylene from vapour pressures, enthalpies of mixing and volume of mixing, and their interpretation in terms of association
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 76, 537-548
- https://doi.org/10.1039/f19807600537
Abstract
Vapour pressure measurements for the system ethanol+p-xylene at 318.15 K are reported. The resulting activity coefficients are compared with those based on freezing-point depression measurements reported earlier. Enthalpies of mixing at 286.45, 308.15 and 318.15 K supplement the existing data. These permit the calculation of activity coefficients at 286.45, 298.15 and 308.15 K over the whole concentration range. The volume of mixing at 286.45 K is included for completion of the study on this system. The data are interpreted in terms of the association model evaluated for the ethanol + cyclohexane system, with an addition of a solvation equilibrium to allow for the interaction between the terminal hydroxyl group of the alcohol chains and a solvent molecule.Keywords
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