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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

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Partanen, Lauri J.
dc.contributor.author Partanen, Jaakko I.
dc.date.accessioned 2020-11-30T08:19:33Z
dc.date.available 2020-11-30T08:19:33Z
dc.date.issued 2020-11-12
dc.identifier.citation Partanen , 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.0c00402 en
dc.identifier.issn 0021-9568
dc.identifier.issn 1520-5134
dc.identifier.other PURE UUID: ca794893-66e4-4c89-8c47-cf0fb5209e2b
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/traceable-values-for-activity-and-osmotic-coefficients-in-aqueous-sodium-chloride-solutions-at-temperatures-from-27315-to-37315-k-up-to-the-saturated-solutions(ca794893-66e4-4c89-8c47-cf0fb5209e2b).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85095803410&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/53170593/acs.jced.0c00402.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/61804
dc.description.abstract We 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.format.extent 14
dc.format.extent 5226-5239
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher AMERICAN CHEMICAL SOCIETY
dc.relation.ispartofseries Journal of Chemical and Engineering Data en
dc.relation.ispartofseries Volume 65, issue 11 en
dc.rights openAccess en
dc.title 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 en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Chemistry and Materials Science
dc.contributor.department Lappeenranta University of Technology
dc.identifier.urn URN:NBN:fi:aalto-2020113020649
dc.identifier.doi 10.1021/acs.jced.0c00402
dc.type.version publishedVersion


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