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Effect of dissolved salt on the anomalies of water at negative pressure



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Zaragoza, Alberto and Tripathi, Chandra Shekhar Pati and González, Miguel A. and Abascal, José Luis F. and Caupin, Frédéric and Valeriani, Chantal (2020) Effect of dissolved salt on the anomalies of water at negative pressure. Journal of chemical physics, 152 (19). ISSN 0021-9606

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Official URL: https://doi.org/10.1063/5.0002745


Adding salt to water at ambient pressure affects its thermodynamic properties. At low salt concentration, anomalies such as the density maximum are shifted to lower temperature, while at large enough salt concentration, they cannot be observed any more. Here, we investigate the effect of salt on an anomaly recently observed in pure water at negative pressure: the existence of a sound velocity minimum along isochores. We compare experiments and simulations for an aqueous solution of sodium chloride with molality around 1.2 mol kg(-1), reaching pressures beyond -100 MPa. We also discuss the origin of the minima in the sound velocity and emphasize the importance of the relative position of the temperatures of sound velocity and density anomalies.

Item Type:Article
Additional Information:

We thank Mikhail A. Anisimov for helpful discussions on critical phenomena in solutions and Christoph Dellago and Andreas Singraber for providing the data used to plot Fig. 12. C.S.P.T. and F.C. acknowledge funding by the European Research Council under the European Community's FP7 Grant Agreement No. 240113. C.V. acknowledges funding from the Spanish Ministry of Education (Grant No. FIS2016-78847). A.Z. was funded by CONACYT (Ph.D. fellowship) and M.A.G. by the Spanish Ministry of Education (Juan de la Cierva fellowship).

Uncontrolled Keywords:Thermodynamic properties; Supercooled water; Density maxima; Liquid-water; Compressibility; Formulation; Cavitation; Inclusions; TIP4P/2005; NACL(AQ)
Subjects:Sciences > Physics > Nuclear physics
ID Code:61372
Deposited On:09 Jul 2020 10:58
Last Modified:13 Jul 2020 13:30

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