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Why does the water vapour surround the cold water bottle?

Updated: 8/18/2019
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14y ago

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The water in the bottle is much colder than the air surrounding it, so the bottle cools the air immediately surrounding it through conduction. This causes the air to cool to its dew point, whereupon some of the moisture in the air will condense onto the bottle.

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Q: Why does the water vapour surround the cold water bottle?
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Where does the water outside a water bottle come from?

If you mean the condensation on the shiny surface of the bottle soon after you've filled it, then it's the cold surface cooling the air around it causing that part of the air to be able to hold less moisture vapour, and this vapour condenses out as liquid. Once the bottle has warmed to the natural air temperature this won't happen any more.


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When the water is warmer, it has a higher vapour pressure making tiny droplets of water (water vapour) more likely form in the air inside the bottle. These droplets will then condense when they make contact with the side of the bottle because it is cooler there. -Alex listin that's soo boring i mean tlk about somtin eles


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