Traceable Values for Activity and Osmotic Coefficients in Aqueous Sodium Chloride Solutions at Temperatures from 273.15 to 373.15 K up to the Saturated Solutions

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPartanen, Lauri J.
dc.contributor.authorPartanen, Jaakko I.
dc.contributor.departmentDepartment of Chemistry and Materials Science
dc.contributor.departmentLUT University
dc.date.accessioned2020-11-30T08:19:33Z
dc.date.available2020-11-30T08:19:33Z
dc.date.issued2020-11-12
dc.description.abstractWe present traceable three-parameter extended Hückel equations for the activity coefficient of sodium chloride and for the osmotic coefficient of water in aqueous NaCl solutions from 273.15 to 373.15 K. In this temperature range, our equations seem to apply within experimental error to all thermodynamic data available for these solutions up to the molality of the saturated solution. Our previous studies (J. Chem. Eng. Data 2017, 62, 2617-2632 and 2019, 64, 16-33) showed that, from 273.15 to 373.15 K, two-parameter Hückel equations can successfully explain the literature results of electrochemical, isopiestic, and cryoscopic measurements at least up to a molality of 0.2 mol·kg-1. The model recommended in this study employs the values of our previous two-parameter model for the ion-size parameter in the original Debye-Hückel equation, B, and for the coefficient of the linear term with respect to the molality, b1. In addition, it includes a quadratic term with respect to the molality with the coefficient b2. Both b1 and b2 are quadratically dependent on temperature. With the introduction of b2, our model is able to explain the existing vapor pressure, electrochemical, and solubility data from 273.15 to 373.15 K up to the saturated solution. A comparison with the most important literature values for the activity and osmotic coefficients revealed that the agreement is always at least satisfactory, but is best for temperatures below 363 K. On the basis of these results, our activity and osmotic coefficients are the most reliable values for these thermodynamic quantities so far. We propose this is true also for the values from 363 to 373 K.en
dc.description.versionPeer revieweden
dc.format.extent14
dc.format.extent5226-5239
dc.format.mimetypeapplication/pdf
dc.identifier.citationPartanen , L J & Partanen , J I 2020 , ' Traceable Values for Activity and Osmotic Coefficients in Aqueous Sodium Chloride Solutions at Temperatures from 273.15 to 373.15 K up to the Saturated Solutions ' , Journal of Chemical and Engineering Data , vol. 65 , no. 11 , pp. 5226-5239 . https://doi.org/10.1021/acs.jced.0c00402en
dc.identifier.doi10.1021/acs.jced.0c00402
dc.identifier.issn0021-9568
dc.identifier.issn1520-5134
dc.identifier.otherPURE UUID: ca794893-66e4-4c89-8c47-cf0fb5209e2b
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/ca794893-66e4-4c89-8c47-cf0fb5209e2b
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dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/61804
dc.identifier.urnURN:NBN:fi:aalto-2020113020649
dc.language.isoenen
dc.publisherAMERICAN CHEMICAL SOCIETY
dc.relation.ispartofseriesJournal of Chemical and Engineering Dataen
dc.relation.ispartofseriesVolume 65, issue 11en
dc.rightsopenAccessen
dc.titleTraceable Values for Activity and Osmotic Coefficients in Aqueous Sodium Chloride Solutions at Temperatures from 273.15 to 373.15 K up to the Saturated Solutionsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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