Surface Tension of Supercooled Water: No Inflection Point down to −25 °C

2014 ◽  
Vol 5 (3) ◽  
pp. 425-428 ◽  
Author(s):  
Jan Hrubý ◽  
Václav Vinš ◽  
Radim Mareš ◽  
Jiří Hykl ◽  
Jana Kalová
Keyword(s):  
Surface Tension ◽  
Inflection Point ◽  
Supercooled Water

Second inflection point of water surface tension in the deeply supercooled regime revealed by entropy anomaly and surface structure using molecular dynamics simulations

2019 ◽  
Vol 21 (6) ◽  
pp. 3360-3369 ◽  
Author(s):  
Xiaoxiang Wang ◽  
Kurt Binder ◽  
Chuchu Chen ◽  
Thomas Koop ◽  
Ulrich Pöschl ◽  
...  
Keyword(s):  
Physical Chemistry ◽  
Molecular Dynamics ◽  
Surface Tension ◽  
Molecular Dynamics Simulations ◽  
Surface Structure ◽  
Water Surface ◽  
Inflection Point ◽  
Supercooled Water ◽  
Atmospheric Sciences ◽  
Dynamics Simulations

The surface tension of supercooled water is of fundamental importance in physical chemistry and materials and atmospheric sciences.

Possible Anomaly in the Surface Tension of Supercooled Water: New Experiments at Extreme Supercooling down to −31.4 °C

2020 ◽  
Vol 11 (11) ◽  
pp. 4443-4447 ◽  
Author(s):  
Václav Vinš ◽  
Jiří Hykl ◽  
Jan Hrubý ◽  
Aleš Blahut ◽  
David Celný ◽  
...  
Keyword(s):  
Surface Tension ◽  
Supercooled Water

scholarly journals Surface tension of supercooled water nanodroplets from computer simulations

2019 ◽  
Vol 150 (23) ◽  
pp. 234507 ◽  
Author(s):  
Shahrazad M. A. Malek ◽  
Peter H. Poole ◽  
Ivan Saika-Voivod
Keyword(s):  
Surface Tension ◽  
Computer Simulations ◽  
Supercooled Water

Second inflection point of water surface tension

2006 ◽  
Vol 89 (16) ◽  
pp. 164106 ◽  
Author(s):  
Y. J. Lü ◽  
B. Wei
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Inflection Point

scholarly journals Some notes on surface tension measurements of supercooled water

2015 ◽  
Vol 92 ◽  
pp. 02050
Author(s):  
Radim Mareš ◽  
Jana Kalová
Keyword(s):  
Surface Tension ◽  
Supercooled Water

scholarly journals Molecular Dynamics Simulation of the Surface Tension of Aqueous Sodium Chloride: from Dilute to Highly Supersaturated Solutions and Molten Salt

2017 ◽  
Author(s):  
Xiaoxiang Wang ◽  
Chuchu Chen ◽  
Kurt Binder ◽  
Uwe Kuhn ◽  
Ulrich Pöschl ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Surface Tension ◽  
Sodium Chloride ◽  
Concentration Dependence ◽  
Inflection Point ◽  
Dynamics Simulation ◽  
Nacl Solution ◽  
Surface Entropy ◽  
Surface Enthalpy ◽  
Supersaturated Solutions

Abstract. Sodium chloride (NaCl) is one of the key components of atmospheric aerosols. The surface tension of aqueous NaCl solution (σNaCl,sol) and its concentration dependence are essential to determine the equilibrium water vapor pressure of aqueous NaCl droplets. Supersaturated NaCl solution droplets are observed in laboratory experiments and under atmospheric conditions, but the experimental data for σNaCl,sol are mostly limited up to sub-saturated solutions. In this study, the surface tension of aqueous NaCl is investigated by molecular dynamics (MD) simulations and pressure tensor method from dilute to highly supersaturated solutions. We show that the linear approximation of concentration dependence of σNaCl,sol at molality scale can be extended to the supersaturated NaCl solution until a molality of ~9.6 mol kg−1 (i.e., solute mass fraction (xNaCl) of ~0.36). Energetic analyses show that this monotonic increase of surface tension is driven by the increase of excessive surface enthalpy (∆H) as the solution becomes concentrated. After that, the simulated σNaCl,sol remains almost unchanged until xNaCl of ~0.47 (near the concentration upon efflorescence). The existence of the inflection point at xNaCl of ~0.36 and the stable surface tension of xNaCl between ~0.36 and ~0.47 can be attributed to a competitive growth of excessive surface entropy term (T · ∆S) and the excessive surface enthalpy term (∆H). After a second inflection point at xNaCl of ~0.47, the simulated σNaCl,sol gradually regains the growing momentum with a tendency to approach the surface tension of molten NaCl (~148.4 mN m−1 at 298.15 K, MD simulation based extrapolation). This fast increase of σNaCl,sol at xNaCl > 0.47 is primarily still an excessive surface enthalpy-driving process, although contribution from concurrent fluctuation of excessive surface entropy is expected but in a relatively smaller scale. Our results reveal different regimes of concentration dependence of the surface tension of aqueous NaCl at 298.15 K: a water-dominated regime (xNaCl from 0 to ~0.36), a transition regime (xNaCl from ~0.36 to ~0.47) and a molten NaCl-dominated regime (xNaCl from ~0.47 to 1).

Second Inflection Point of the Surface Tension of Water

2012 ◽  
Vol 33 (6) ◽  
pp. 992-999 ◽  
Author(s):  
Jana Kalova ◽  
Radim Mares
Keyword(s):  
Surface Tension ◽  
Inflection Point
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