Thermal Behavior of Water-Electrolyte Mixtures: Structural and Ionic Influences
Received: 6 April 2025 | Revised: 13 May 2025 | Accepted: 17 May 2025 | Online: 2 August 2025
Corresponding author: Ulzhalgas Nazarbek
Abstract
This study investigates the thermal properties of water-electrolyte mixtures, specifically focusing on binary and ternary electrolyte solutions over a concentration range of 0.01 mol%–23.5 mol% at two constant temperatures (20°C and 40°C). The results indicate that the specific Heat Capacity (Cp) and Thermal Conductivity (λ) exhibit polynomial dependencies on the ionic radius and charge density. As the ionic radius increases from 0.72 Å (Co²⁺) to 1.65 Å (Cs⁺), Cp decreases by up to 12%. As the charge density increases from 0.0468 C/Ų (Cs⁺) to 0.4921 C/Ų (Co²⁺), Cp increases by up to 15%, while λ decreases by 8%-20% with an increasing charge density, confirming the influence of hydration. These results provide a quantitative framework for electrolyte-based thermal applications in energy storage, water treatment, and thermodynamic modeling.
Keywords:
water-electrolyte mixtures, specific heat capacity, thermal conductivity, hydrated ions, ionic radiusDownloads
References
D. C. Kabiraz, T. K. Biswas, and M. Entazul Huque, "Physico-chemical properties of some electrolytes in water and aqueous sodiumdodecyl sulfate solutions at different temperatures," The Journal of Chemical Thermodynamics, vol. 43, no. 12, pp. 1917–1923, Dec. 2011. DOI: https://doi.org/10.1016/j.jct.2011.06.024
M. Huque, I. A. Siddiquey, and Md. N. Uddin, "Physico-chemical study of aqueous solutions of electrolytes in mixed solvents," The Journal of Chemical Thermodynamics, vol. 38, no. 11, pp. 1474–1478, Nov. 2006. DOI: https://doi.org/10.1016/j.jct.2006.01.002
H. A. Fakhim, "An Investigation of the Effect of Different Nanofluids in a Solar Collector," Engineering, Technology & Applied Science Research, vol. 7, no. 4, pp. 1741–1745, Aug. 2017. DOI: https://doi.org/10.48084/etasr.1283
A. A. Zavitsas, "Properties of Water Solutions of Electrolytes and Nonelectrolytes," The Journal of Physical Chemistry B, vol. 105, no. 32, pp. 7805–7817, Aug. 2001. DOI: https://doi.org/10.1021/jp011053l
A. Mudhoo and C. U. Pittman, "The Dubinin-Radushkevich models: Dissecting the ps/p to cs/ce replacement in solid-aqueous interfacial adsorption and tracking the validity of E = 8 kJ mol–1 for assigning sorption type," Chemical Engineering Research and Design, vol. 198, pp. 370–402, Oct. 2023. DOI: https://doi.org/10.1016/j.cherd.2023.09.020
C. Q. Sun and Y. Sun, "Aqueous Solutions: Quantum Specification," in The Attribute of Water: Single Notion, Multiple Myths, C. Q. Sun and Y. Sun, Eds. Singapore: Springer, 2016, pp. 305–363. DOI: https://doi.org/10.1007/978-981-10-0180-2_12
M. Kanduč, A. Schlaich, E. Schneck, and R. R. Netz, "Water-Mediated Interactions between Hydrophilic and Hydrophobic Surfaces," Langmuir, vol. 32, no. 35, pp. 8767–8782, Sep. 2016. DOI: https://doi.org/10.1021/acs.langmuir.6b01727
G. Oshanin, M. N. Popescu, and S. Dietrich, "Active colloids in the context of chemical kinetics," Journal of Physics A: Mathematical and Theoretical, vol. 50, no. 13, Nov. 2017, Art. no. 134001. DOI: https://doi.org/10.1088/1751-8121/aa5e91
I. A. Kirilenko, "Water–Electrolyte Glass-Forming Systems: A Review," Russian Journal of Inorganic Chemistry, vol. 63, no. 13, pp. 1731–1745, Dec. 2018. DOI: https://doi.org/10.1134/S0036023618130053
D. I. Mendeleev, "Solutions," Moscow: Publishing House of USSR Academy of Sciences, 1959.
M. Arshad et al., "Experimental measurements and modelling of viscosity and density of calcium and potassium chlorides ternary solutions," Scientific Reports, vol. 10, no. 1, Oct. 2020, Art. no. 16312. DOI: https://doi.org/10.1038/s41598-020-73484-4
S. M. Saqib Nadeem, "Viscometric Study of Ionic Interactions of MgSO4 in Water and Water–Ethanol Mixtures at Different Temperatures," Russian Journal of Physical Chemistry A, vol. 96, no. 4, pp. 849–859, Apr. 2022. DOI: https://doi.org/10.1134/S0036024422040306
U. Hoffert et al., "Density of pure and mixed NaCl and CaCl2 aqueous solutions at 293 K to 353 K and 0.1 MPa: an integrated comparison of analytical and numerical data," Geothermal Energy, vol. 12, no. 1, Oct. 2024, Art. no. 39. DOI: https://doi.org/10.1186/s40517-024-00318-1
H. Li, W. Xu, F. Jia, J. Li, S. Song, and Y. Nahmad, "Correlation between surface charge and hydration on mineral surfaces in aqueous solutions: A critical review," International Journal of Minerals, Metallurgy and Materials, vol. 27, no. 7, pp. 857–871, Jul. 2020. DOI: https://doi.org/10.1007/s12613-020-2078-0
H. Al-Salih and Y. Abu-Lebdeh, "Investigating the phase diagram-ionic conductivity isotherm relationship in aqueous solutions of common acids: hydrochloric, nitric, sulfuric and phosphoric acid," Scientific Reports, vol. 14, no. 1, Apr. 2024, Art. no. 7894. DOI: https://doi.org/10.1038/s41598-024-56552-x
D. Połomski and M. Chotkowski, "Choline chloride-acetic acid mixture as a medium for the investigation of the electrochemical processes," Journal of Solid State Electrochemistry, vol. 28, no. 5, pp. 1463–1474, May 2024. DOI: https://doi.org/10.1007/s10008-023-05590-y
M. Mosher and P. Kelter, "The Chemistry of Water: Aqueous Solutions and Their Properties," in An Introduction to Chemistry, M. Mosher and P. Kelter, Eds. Cham: Springer International Publishing, 2023, pp. 553–586. DOI: https://doi.org/10.1007/978-3-030-90267-4_12
M. R. Becker, R. R. Netz, P. Loche, D. J. Bonthuis, D. Mouhanna, and H. Berthoumieux, "Dielectric Properties of Aqueous Electrolytes at the Nanoscale," Physical Review Letters, vol. 134, no. 15, Apr. 2025, Art. no. 158001. DOI: https://doi.org/10.1103/PhysRevLett.134.158001
S. H. Yalkowsky, Y. He, and P. Jain, Handbook of Aqueous Solubility Data. CRC Press, 2016. DOI: https://doi.org/10.1201/EBK1439802458
R. Tiwari et al., "Fundamental chemical and physical properties of electrolytes in energy storage devices: A review," Journal of Energy Storage, vol. 81, Mar. 2024, Art. no. 110361. DOI: https://doi.org/10.1016/j.est.2023.110361
S. Porcedda, M. Usula, and B. Marongiu, "Physical–Chemical Properties of Ionic Liquid-Containing Mixtures," in The Structure of Ionic Liquids, R. Caminiti and L. Gontrani, Eds. Cham: Springer International Publishing, 2014, pp. 173–193. DOI: https://doi.org/10.1007/978-3-319-01698-6_7
K. N. Marsh, J. A. Boxall, and R. Lichtenthaler, "Room temperature ionic liquids and their mixtures—a review," Fluid Phase Equilibria, vol. 219, no. 1, pp. 93–98, May 2004. DOI: https://doi.org/10.1016/j.fluid.2004.02.003
V. N. Makhlaichuk and N. P. Malomuzh, "Peculiarities of structure in aqueous electrolyte solutions and specificity of hydration effects," Journal of Molecular Liquids, vol. 349, Mar. 2022, Art. no. 118088. DOI: https://doi.org/10.1016/j.molliq.2021.118088
M. Laliberté and W. E. Cooper, "Model for Calculating the Density of Aqueous Electrolyte Solutions," Journal of Chemical & Engineering Data, vol. 49, no. 5, pp. 1141–1151, Sep. 2004. DOI: https://doi.org/10.1021/je0498659
M. Amiri and D. Bélanger, "Physicochemical and Electrochemical Properties of Water-in-Salt Electrolytes," ChemSusChem, vol. 14, no. 12, pp. 2487–2500, 2021. DOI: https://doi.org/10.1002/cssc.202100550
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Copyright (c) 2025 Galiya Kambarova, Ulzhalgas Nazarbek, Yerkebulan Raiymbekov
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