Thermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure

Página do item simplificado
dc.contributor.authorHoga H.E.
dc.contributor.authorTorres R.B.
dc.contributor.authorVolpe P.L.O.
dc.date.accessioned2019-08-20T00:12:05Z
dc.date.available2019-08-20T00:12:05Z
dc.date.issued2018
dc.description.abstract© 2018 Elsevier LtdDensities (ρ), speeds of sound (u) and viscosities (η) for binary mixtures of {water + ethanol, or + ethylene glycol (EG), or + diethylene glycol (DEG), or + triethylene glycol (TEG), or + polyethylene glycol (PEG) 200, or + polyethylene glycol (PEG) 300, or + polyethylene glycol (PEG) 400, or + polyethylene glycol (PEG) 600, or + glycerol} have been determined as a function of composition at T = (293.15, 298.15, 303.15 and 308.15 K) and atmospheric pressure. From these results, excess molar volume (VmE), deviation in isentropic compressibility (ΔκS), deviation in viscosity (Δη), and excess Gibbs energy of activation for viscous flow (ΔG∗E) were calculated and fitted by the Myers-Scott equation, as a function of mole fraction. Values of VmE and ΔκS were negative over the entire composition range for all mixtures studied. The values of Δη were negative for the systems containing ethylene glycol and glycerol and positive for the systems containing ethanol, PEG 400 and PEG 600. For other systems, the deviation of viscosity presented an S-shape, with negative values at high water concentration. For all mixtures studied, the values of ΔG∗E were positive over the entire composition range. The results obtained were discussed in terms of structural effects and intermolecular interactions between like and unlike molecules.
dc.description.firstpage38
dc.description.lastpage64
dc.description.volume122
dc.identifier.citationHOGA, HELOISA EMI; TORRES, Ricardo Belchior; VOLPE, Pedro Luiz Onófrio. Thermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure. JOURNAL OF CHEMICAL THERMODYNAMICS, v. 122, p. 38-64, 2018.
dc.identifier.doi10.1016/j.jct.2018.02.022
dc.identifier.issn1096-3626
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1744
dc.relation.ispartofJournal of Chemical Thermodynamics
dc.rightsAcesso Restrito
dc.subject.otherlanguageDensity
dc.subject.otherlanguageEthanol
dc.subject.otherlanguageGlycerol
dc.subject.otherlanguageGlycols
dc.subject.otherlanguagePEGs
dc.subject.otherlanguageSpeed of sound
dc.subject.otherlanguageViscosity
dc.subject.otherlanguageWater
dc.titleThermodynamics properties of binary mixtures of aqueous solutions of glycols at several temperatures and atmospheric pressure
dc.typeArtigo
fei.scopus.citations34
fei.scopus.eid2-s2.0-85043455356
fei.scopus.subjectComposition ranges
fei.scopus.subjectDeviation in viscosity
fei.scopus.subjectExcess Gibbs energy
fei.scopus.subjectExcess molar volumes
fei.scopus.subjectIntermolecular interactions
fei.scopus.subjectIsentropic compressibility
fei.scopus.subjectSpeeds of sound (u)
fei.scopus.subjectThermodynamics property
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85043455356&origin=inward
Arquivos
Coleções
Artigos