Gases
Fluidity of Gases
Carbon Dioxide
Play movie (9 seconds, .5 MB)
When dense carbon dioxide gas is poured, it flows down a trough, extinguishing the candles in its path.
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Methane
Play movie (12 seconds, .8 MB)
Methane gas escapes from a beaker and flows up a trough to a candle flame. The flammable gas ignites, producing a beautiful blue flame.
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© 1997 Division of Chemical Education, Inc., American Chemical Society. All rights reserved.