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Effect of Alcohol Structure on Heat Capacity Behavior of Choline Chloride-Based Deep Eutectic Solvents

Author

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  • Janvi Patel

    (Department of Chemistry, Mahavir University, Surat 395 007, India)

  • Omshubham Kedia

    (Department of Chemistry, Mahavir University, Surat 395 007, India)

  • Ankit Shah

    (Department of Chemistry, Mahavir University, Surat 395 007, India)

Abstract

This study investigates the molar heat capacities (Cp) of three choline chloride-based deep eutectic solvents (DESs)—Reline, Ethaline, and Glyceline—and their binary mixtures with two structurally distinct alcohols: 1-butanol (linear) and 2-butanol (branched). Cp measurements were carried out under standard pressure using a differential scanning calorimeter (DSC) across a temperature range of 303.2 K to 353.2 K at various compositions. Results show that Cp increases with both temperature and DES concentration. The temperature dependence of pure DESs was well described using a second-order empirical model, with an average absolute deviation (AAD%) of 0.05. The binary mixtures exhibited predominantly negative excess molar heat capacities (Cpᴱ), indicating non-ideal mixing behavior due to altered hydrogen-bonding interactions. The Redlich–Kister polynomial equation effectively correlated the Cpᴱ values with temperature and composition. The comparative analysis of mixtures with linear and branched alcohols highlights the significant impact of molecular structure on thermal behavior, providing valuable insights for designing sustainable solvents for heat-sensitive and green chemical processes.

Suggested Citation

  • Janvi Patel & Omshubham Kedia & Ankit Shah, 2025. "Effect of Alcohol Structure on Heat Capacity Behavior of Choline Chloride-Based Deep Eutectic Solvents," International Journal of Latest Technology in Engineering, Management & Applied Science, International Journal of Latest Technology in Engineering, Management & Applied Science (IJLTEMAS), vol. 14(7), pages 891-898, July.
    • Handle: RePEc:bjb:journl:v:14:y:2025:i:7:p:891-898
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