How to Supercool Water

One of the interesting facts about water is that it does not always freeze at 273.15 K. Actually, 'pure water', which is water with no impurities and free of nucleation sites, can stay in liquid form for temperatures as low as 224.8 K.

When pure water is supercooled it is very easy to freeze it, because any iteraction with the water molecules in that state can result in the formation of nucleation sites, that will instantly result in the freezing of water.

This video is a simple and nice representation on how to supercool water and then freeze it instantly!


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