University of Oulu

Akilan, C., Chen, T., Vielma, T., May, P. M., Senanayake, G., & Hefter, G. (2020). Volumes and Heat Capacities of Cobalt(II), Nickel(II), and Copper(II) Sulfates in Aqueous Solution. Journal of Chemical & Engineering Data, 65(9), 4575–4581.

Volumes and heat capacities of cobalt(II), nickel(II), and copper(II) sulfates in aqueous solution

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Author: Akilan, Chandrika1; Chen, Ting1; Vielma, Tuomas2;
Organizations: 1Chemistry Department, Murdoch University, Murdoch, Western Australia 6150, Australia
2Research Unit of Sustainable Chemistry, University of Oulu, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: American Chemical Society, 2020
Publish Date: 2021-08-10


The densities and isobaric volumetric heat capacities of aqueous solutions of the sulfate salts of cobalt(II), nickel(II), and copper(II) have been measured at 298.15 K and 0.1 MPa using vibrating-tube densimetry and Picker flow calorimetry, respectively, at concentrations in the range 0.01 ≲ m/mol·kg–1 ≲ 1.5. These data were used to derive the corresponding apparent molar volumes, Vϕ, and apparent molar isobaric heat capacities, C. Where comparisons were possible, the present Vϕ results were in good agreement with literature data. No C data appear to have been reported previously for any of these salts. The variations of Vϕ and Cpϕ with concentration were well correlated using the Pitzer formalism combined with the values of and Cp° estimated from literature data. Both Vϕ and C for all three salts show remarkable similarities and can be shown to lie on a common line by applying fixed addends over almost the whole concentration range studied.

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Series: Journal of chemical & engineering data
ISSN: 0021-9568
ISSN-E: 1520-5134
ISSN-L: 0021-9568
Volume: 65
Issue: 9
Pages: 4575 - 4581
DOI: 10.1021/acs.jced.0c00407
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This work was funded by Murdoch University and (for T.V.) the Walter Ahlström Foundation, Finland.
Copyright information: This document is the Accepted Manuscript version of a Published Work that appeared in final form in J. Chem. Eng. Data, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see