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Thermal Properties of Matter
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Change of State
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Why does steam rise from the cooking pot
Question
Why does steam rise from the cooking pot when I turn off the heat after the water starts boiling?
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Updated on : 2022-09-05
Solution
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Water evaporates from the surface and the higher the
temperature, the faster it evaporates. The higher the rate
of evaporation, the more likely it is that individual
evaporated molecules will coalesce with others to form
droplets of water large enough to be seen. That is what
steam is and what clouds are. But steam can be observed even
at low temperatures under the right conditions, for example
the morning mist on the surface of a lake or fog. The water
in the cooking pot, if you observe it carefully, will begin
to steam before it starts boiling. So it should be no
surprise to find that it still steams after you turn off the
heat.
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