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What is the cloud that forms at the top of carbonated beverages when they're opened?

Oct 17, 2011 3:03 AM

Whenever I open a bottle of something carbonated, be it seltzer, soda, or beer, I notice a little mist gathers at the top of the bottle. Does anyone know what that cloud is made of? Is it just water vapor, and how/why does it form when I open the bottle?

yankeefan1087 yankeefan1087

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it's carbondioxide

capguncowboy capguncowboy
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Actually, it is water vapor. The release of the carbonation into the air causes the liquid surface to cool. Water vapor in the vicinity is cooled as well and so condenses.

nortonsark nortonsark
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@nortonsark: So it's not tiny little Who-verses that come in & out of existence in a blink of an eye?

lavikinga lavikinga
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CO2 and the water vapor it carries into the air above the fluid surface...

hobbitss hobbitss

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