Thermodynamic anomalies of water near its singular temperature of 42 °C

Bulavin, Leonid A.; Rudnikov, Yevgenii G.; Chalyi, Alexander V.

doi:10.1016/j.molliq.2023.122849

Journal of Molecular Liquids

2023

DOI: 10.1016/j.molliq.2023.122849

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Thermodynamic anomalies of water near its singular temperature of 42 °C

Leonid A. Bulavin,

Yevgenii G. Rudnikov,

Alexander V. Chalyi

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2024

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Cited by 3 publications

References 57 publications

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Temperature-induced structure evolution in CoxBy liquids studied by ab initio molecular dynamics simulation

Jin,

Wang,

et al. 2024

Results in Physics

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Temperature-induced structure evolution in CoxBy liquids studied by ab initio molecular dynamics simulation

Jin,

Wang,

et al. 2024

Results in Physics

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Contributions to the isothermal compressibility coefficient of water near the temperature of 42 °C

Bulavin,

Rudnikov,

Chalyi

2024

AIP Advances

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Using modern databases, the behavior of the isothermal compressibility coefficient −(∂V/∂P)T = VβT of water in the liquid state near its specific temperature of θ = 42.2 ± 0.2 °C was analyzed. The applicability of the principle of corresponding states in a wide range of thermodynamic parameters of water has been confirmed, excluding the area of water anomalies. The following anomalies of the physical–chemical properties of water were observed: (a) the temperature of θ = 42.2 ± 0.2 °C was found at which the entropy contribution to the isothermal compressibility coefficient of water changed its sign and became positive below this temperature; (b) the temperature of θ = 28.8 ± 0.2 °C was found at which the energy contribution to the isothermal compressibility coefficient of water changed its sign and became negative below this temperature; and (c) the temperature of θ = 17.6 ± 0.2 °C was found at which the energy and entropy contributions to the isothermal compressibility coefficient of water were equal. The entropy contribution to the isothermal compressibility coefficient, according to the two-structure model of water, can be associated with the existence of an “expanded” low-density water structure of hydrogen bonds, the role of which increases with decreasing temperature. We associate the energy contribution to the isothermal compressibility coefficient with the “collapsed” high-density water structure of hydrogen bonds, the role of which in the field of thermodynamic anomalies of water decreases as the temperature decreases.

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Фазові Діаграми Ізотопологів Води Та Інертних Речовин

Bulavin,

Rudnikov,

Samoilenko

2024

Ukr. J. Phys.

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У роботi наведено фазовi дiаграми, якi розраховано за лiтературними даними для iзотопологiв води та iнертних речовин. Проведено перевiрку принципу вiдповiдних станiв при використаннi калоричних змiнних. Показано, що у приведених координатах температури, тиску та хiмiчного потенцiалу iзотопологи води складають одну групу речовин i мають подiбнi фазовi дiаграми. Разом з тим, iнертнi речовини, починаючи з аргону, в зазначених координатах утворюють iншу групу речовин з подiбними фазовими дiаграмами. В той самий час, гелiй та неон, для яких квантовий параметр де Бура за величиною є значним, мають фазовi дiаграми, вiдмiннi вiд дiаграм для iнших iнертних речовин. Спрогнозовано фазовi дiаграми тритiйованої води T2O та радону Rn.

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Thermodynamic anomalies of water near its singular temperature of 42 °C

Cited by 3 publications

References 57 publications

Temperature-induced structure evolution in CoxBy liquids studied by ab initio molecular dynamics simulation

Temperature-induced structure evolution in CoxBy liquids studied by ab initio molecular dynamics simulation

Contributions to the isothermal compressibility coefficient of water near the temperature of 42 °C

Фазові Діаграми Ізотопологів Води Та Інертних Речовин

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