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dc.contributor.authorCobos, Ana .
dc.contributor.authorGonzález, Juan Antonio .
dc.contributor.authorHevia, Fernando .
dc.contributor.authorGarcía de la Fuente, Isaías .
dc.contributor.authorAlonso Tristán, Cristina 
dc.date.accessioned2018-09-07T11:17:49Z
dc.date.issued2017-12
dc.identifier.issn0167-7322
dc.identifier.urihttp://hdl.handle.net/10259/4927
dc.description.abstractData on density, ρ, speed of sound, c, and refractive index, nD, have been reported at (293–303.15) K for the N,N-dimethylacetamide (DMA) + CH3CO(CH2)u − 1CH3 (u = 1, 2, 3) systems, and at 298.15 K for the mixture with u = 5. These data have been used to compute excess molar volumes, VmE, excess adiabatic compressibilities, κSE, and excess speeds of sound cE. Negative VmE values indicate the existence of structural effects and interactions between unlike molecules. From molar excess enthalpies, HmE, available in the literature for N,N-dimethylformamide (DMF), or N-methylpyrrolidone (NMP) + n-alkanone systems, it is shown: (i) amide-ketone interactions are stronger in DMF systems than in those with NMP; (ii) they become weaker when u increases in mixtures with a given amide. Structural effects largely contribute toHmE and are more relevant in mixtures containing NMP. The application of the Flory's model reveals that the random mixing hypothesis is valid in large extent for DMF solutions, while NMP systems are characterized by rather strong orientational effects. From values of molar refraction and of the product PintVm (where Pint is the internal pressure and Vm the molar volume), it is concluded that dispersive interactions increase with u, or when DMF is replaced by DMA in mixtures with a fixed ketone.en
dc.description.sponsorshipJunta de Castilla y León, under Project BU034U16en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherElsevieren
dc.relation.ispartofJournal of Molecular Liquids. 2017, V. 248, p. 286-301en
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAmidesen
dc.subjectn-Alkanonesen
dc.subjectThermophysical propertiesen
dc.subjectFloryen
dc.subjectRandom mixingen
dc.subject.otherFísicaes
dc.subject.otherPhysicsen
dc.titleThermodynamics of amide + ketone mixtures. 2. Volumetric, speed of sound and refractive index data for N,N-dimethylacetamide + 2-alkanone systems at several temperatures. Application of Flory's model to tertiary amide + n-alkanone systemsen
dc.typeArtículoes
dc.typeinfo:eu-repo/semantics/article
dc.date.embargo2020-01
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1016/j.molliq.2017.10.007
dc.relation.projectIDinfo:eu-repo/grantAgreement/JCyL/BU034U16
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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