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Isobaric thermal expansivities of binary mixtures ofn-Hexane with 1-hexanol at pressures from 0.1 to 350 MPa and at temperatures from 303 to 503 K
Authors:S L Randzio  J -P E Grolier  J R Quint
Affiliation:(1) Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warszawa, Poland;(2) Laboratoire de Thermodynamique et Génie Chimique (URA CNRS 434), Université Blaise Pascal, F-63177 Aubière, France
Abstract:Isobaric thermal expansivities, αp(p, T), of seven binary mixtures ofn-hexane with l-hexanol (0.0553, 0.1088, 0.2737, 0.2983, 0.4962, 0.6036, and 0.7455 mol fraction of l-hexanol) have been measured with a pressure-controlled scanning calorimeter over the pressure range from just above the saturation pressures to 350 MPa and at temperatures from 302.6 to 503.1 K. The low-temperature isotherms of αp for particular mixtures observed with respect to the unique crossing point ofn-hexane isotherms reveal an association effect which is reduced when the temperature increases. The high-temperature isotherms of αp are very similar to the isotherms of puren-hexane, especially for lower mole fractions ofn-hexanol. No known equation of state can reproduce these properties.
Keywords:l-hexanol            n-hexane  high pressure  mixtures  pressure-controlled scanning calorimetry  thermal expansivities
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