The Mpemba effect is the theory that warmer water can freeze faster than
colder water. The effect has been noted since ancient times but
scientists have struggled to explain why it occurs. Hydrogen bonds bring
individual water molecules into close contact, which triggers natural
repulsion between the water molecules and causes the bonds between
oxygen and hydrogen atoms to stretch as well as store energy.
So as the liquid warms, it makes the water molecules sit further apart from each other as the hydrogen bonds stretch. When the molecules shrink again and give up their energy, this results in it cooling, which the scientists say means that warm water cools faster than cold water and explains the Mpemba effect.
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So as the liquid warms, it makes the water molecules sit further apart from each other as the hydrogen bonds stretch. When the molecules shrink again and give up their energy, this results in it cooling, which the scientists say means that warm water cools faster than cold water and explains the Mpemba effect.
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