Thermodynamics of fluorocarbon–hydrocarbon mixtures. The systems formed by 2,2,4-trimethylpentane with hexafluorobenzene and with hexafluorobenzene–benzene
- 1 January 1988
- 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. 84 (2) , 539-550
- https://doi.org/10.1039/f19888400539
Abstract
The excess volume of hexafluorobenzene (C6F6)–2,2,4-trimethylpentane (2,2,4-TMP) has been measured at 298.15 K as well as the vapour pressures at 298.15, 323.15 and 348.15 K. From the latter, the excess Gibbs energies have been calculated, and the excess enthalpies have been estimated through the Gibbs–Helmholtz equation. The comparison with similar data for binary systems involving benzene (C6H6), C6F6, 2,2,4-TMP and cyclohexane (c-C6H12) shows that c-C6H12 and 2,2,4-TMP have quite different volumetric and entropic behaviours when mixed with C6F6, whilst they are almost equivalent when mixed with C6H6. Finally, the vapour pressures have been measured and the excess Gibbs energies calculated at 298.15 and 323.15 K for the ternary system C6F6–C6H6–2,2,4-TMP.Keywords
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