Hello, Habr! I present to your attention the translation of the article "Why Hot Water Freezes Faster Than Cold — Physicists Solve the Mpemba Effect" .
From the translator: all my life I was tormented by a question, but here on you, they again explained.
Summary: due to the presence of hydrogen bonds in water molecules, the configuration of the O-H covalent bonds changes, with the accumulation of additional energy in them, released during cooling and working as an additional heating that prevents freezing. In hot water, hydrogen bonds are stretched, covalent bonds are not strained, the energy storage is low and freezing occurs faster. There is a certain characteristic time tau required for the formation of hydrogen bonds; if the cooling process proceeds slowly, the Mpemba effect will disappear. If the cooling process is relatively fast (up to tens of minutes), then the effect is pronounced. Probably, there must also be some critical temperature, starting from which the effect appears, but this is not reflected in the article.
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P.S. 2016 — (Chang Q. Sun) (Yi Sun) , , , , - (Springer).
Ref: arxiv.org/abs/1310.6514: O:H-O Bond Anomalous Relaxation Resolving Mpemba Paradox
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- https://doi.org/10.1103/PhysRevX.9.021060
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