Anomalous expansion of water
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Anomalous Expansion of water & its effects When water is heated from 00C to 40C it contracts continously instead of expanding. Conversely expands when cooled down from 40C to 00C . This expansion of water from 40C to 00C is called anomalous expansion. When heated from 40C to 1000C its expansion is normal like the expansion of other liquids. Since water contracts when heated from 00C to 40C and expands from 40C to 1000C , its volume is smallest and the density is maximum at 40C. Hence water is heaviest at 40C.

The abnormal property of water in which it expands and does not contract when the temperature goes from 4 degree Celsius to 0 degree Celsius , and it becomes less dense, is known as anomalous explansion of water. Due to this property,the density of water becomes less and it freezes because the molecules of water normally form open crystal structures when they are in solid form.

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