Abstract
Excess molar volumes, V E, are reported for binary mixtures of 1-hexanol with the homologous C6, C7, C8, and C10 1-alkenes at 25°C. In this series of mixtures, the V E values vary as a function of mole fraction from positive–negative “sigmoid” shaped curves exhibiting a very small positive lobe in the dilute alkanol region for the shortest chain 1-alkene to positive values over the whole concentration range for the longer chain 1-alkene. The partial molar excess volumes, V i E, were calculated for the components over the whole concentration range. The partial molar volume of 1-hexanol in the 1-hexene system shows a large and sharp minimum and in the 1-decene system is positive over the whole concentration range. The modified model [Treszczanowicz et al., J. Solution Chem. 31, 455 (2002) originally proposed by Treszczanowicz and Benson Fluid Phase Equilibr. 23, 117 (1985)] was used for the interpretation and prediction of the reported data. The model describes qualitatively the variation of V E with the length of the molecule and concentration as a result of superposition of the contributions of association, free volume, and nonspecific interactions.
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Treszczanowicz, A.J., Treszczanowicz, T., Pawłowski, T.S. et al. Excess Molar Volumes for Binary Mixtures of 1-Alkanol and 1-Alkene. III. The System 1-Hexanol + 1-Alkene at 25°C. Journal of Solution Chemistry 33, 1049–1060 (2004). https://doi.org/10.1023/B:JOSL.0000048055.70825.8b
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DOI: https://doi.org/10.1023/B:JOSL.0000048055.70825.8b