Asked in ChemistrySnow and IceEarth Sciences
Chemistry
Snow and Ice
Earth Sciences
Why do some water droplets in clouds remain liquid at temperature less than zero degrees?
Answer
Wiki User
September 07, 2007 10:48AM
Ice crystals require something to start growing on (a nucleus), such a sdirt/dust etc. If the droplet is pure, there is no nucleus to start off the crystallisation process. Hence a drop of water becomes supercooled. Water will spontaneously freeze at -42C (approx) if it lacks the nucleus.
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