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dc.contributor.authorHevia, Fernando .
dc.contributor.authorGonzález, Juan Antonio
dc.contributor.authorCobos, Ana .
dc.contributor.authorGarcía de la Fuente, Isaías .
dc.contributor.authorAlonso Tristán, Cristina 
dc.date.accessioned2018-05-16T10:54:52Z
dc.date.issued2018-07
dc.identifier.issn0378-3812
dc.identifier.urihttp://hdl.handle.net/10259/4791
dc.description.abstractRelative permittivities at 1 MHz, , and refractive indices at the sodium D-line, , are reported at 0.1 MPa and at (293.15–303.15) K for the binary systems 1-alkanol + n-hexylamine (HxA). Also, their corresponding excess functions are calculated and correlated. Positive values of the excess permittivities, , are encountered for the methanol system, whereas the remaining mixtures show negative values. This reveals that interactions between unlike molecules contribute positively to . This contribution is dominant for the methanol mixture, while those arising from the breaking of interactions between like molecules are prevalent for the remaining mixtures. At (volume fraction) = 0.5, changes in the order: methanol > 1-propanol > 1-butanol > 1-pentanol < 1-heptanol. Similar variation with the chain length of the 1-alkanol is observed for mixtures such as 1-alkanol + heptane, or + cyclohexylamine, and can be explained in terms of the lower and weaker self-association of longer 1-alkanols. The effect of the replacement of HxA by cyclohexylamine, or by aniline, is also shown. Calculations on molar refractions indicate that dispersive interactions in the systems under study increase with the length of the 1-alkanol. The mixtures are studied by means of the application of the Kirkwood-Fröhlich model, and the Kirkwood correlation factors, including the corresponding excess values, are reported.en
dc.description.sponsorshipMinisterio de Educación, Cultura y Deporte for the grants FPU14/04104 and FPU15/05456 respectively. The authors gratefully acknowledge the financial support received from the Consejería de Educación y Cultura of Junta de Castilla y León, under Project BU034U16.en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofFluid Phase Equilibria. 2018, V. 468, p. 18-28en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject1-alkanolen
dc.subjectn-hexylamineen
dc.subjectPermittivityen
dc.subjectRefractive indexen
dc.subjectKirkwood correlation factoren
dc.titleThermodynamics of mixtures with strongly negative deviations from Raoult's law. XV. Permittivities and refractive indices for 1-alkanol + n-hexylamine systems at (293.15–303.15) K. Application of the Kirkwood-Fröhlich modelen
dc.typeArtículoes
dc.typeinfo:eu-repo/semantics/article
dc.date.embargo2020-07
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1016/j.fluid.2018.04.007
dc.identifier.doi10.1016/j.fluid.2018.04.007
dc.relation.projectIDinfo:eu-repo/grantAgreement/JCyL/BU034U16
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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