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An Informational Theoretical Approach to the Entropy of Liquids and Solutions
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Entropy 2018, 20(7), 524; https://doi.org/10.3390/e20070524

The Entropy of Deep Eutectic Solvent Formation

Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Received: 29 May 2018 / Revised: 25 June 2018 / Accepted: 11 July 2018 / Published: 12 July 2018
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Abstract

The standard entropies S298°E of deep eutectic solvents (DESs), which are liquid binary mixtures of a hydrogen bond acceptor component and a hydrogen bod donor one, are calculated from their molecular volumes, derived from their densities or crystal structures. These values are compared with those of the components—pro-rated according to the DES composition—to obtain the standard entropies of DES formation ΔfS. These quantities are positive, due to the increased number and kinds of hydrogen bonds present in the DESs relative to those in the components. The ΔfS values are also compared with the freezing point depressions of the DESs ΔfusT/K, but no general conclusions on their mutual relationship could be drawn. View Full-Text
Keywords: deep eutectic solvent (DES); molecular volume; standard entropy; hydrogen bonding deep eutectic solvent (DES); molecular volume; standard entropy; hydrogen bonding
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Marcus, Y. The Entropy of Deep Eutectic Solvent Formation. Entropy 2018, 20, 524.

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