Some Aspects of the Liquid Water Thermodynamic Behavior: From The Stable to the Deep Supercooled Regime
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ijms-21-07269-v2.pdf
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640.33 KB
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Author(s)
Mallamace, Francesco
Mensitieri, Giuseppe
Mallamace, Domenico
Salzano de Luna, Martina
Chen, Sow-Hsin
Date Issued
October 1, 2020
Publisher
Multidisciplinary Digital Publishing Institute
Citation
International Journal of Molecular Sciences 21 (19): 7269 (2020)
Version
Final published version
Abstract
Liquid water is considered to be a peculiar example of glass forming materials because of the possibility of giving rise to amorphous phases with different densities and of the thermodynamic anomalies that characterize its supercooled liquid phase. In the present work, literature data on the density of bulk liquid water are analyzed in a wide temperature-pressure range, also including the glass phases. A careful data analysis, which was performed on different density isobars, made in terms of thermodynamic response functions, like the thermal expansion αP and the specific heat differences CP−CV, proves, exclusively from the experimental data, the thermodynamic consistence of the liquid-liquid transition hypothesis. The study confirms that supercooled bulk water is a mixture of two liquid “phases”, namely the high density (HDL) and the low density (LDL) liquids that characterize different regions of the water phase diagram. Furthermore, the CP−CV isobars behaviors clearly support the existence of both a liquid–liquid transition and of a liquid–liquid critical point.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.3390/ijms21197269
