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Why there have bubble in beer

  1. Sep 23, 2006 #1
    why there have bubble in beer,
    what the pathway do the bubbles go in pv diagram

    my idea :

    assume temperature is constant
    pressure in the bottom is higher than the suface
    so the bubbles size increase

    then where the energy come from????
  2. jcsd
  3. Sep 23, 2006 #2
    is this action violate the first law of thermodynamics??
    how about if you shake the beer, is it mean you input the energy into the system , then do it violate the 1st of thermodynamic?
  4. Sep 24, 2006 #3


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    Gold Member

    Run a Google search on "carbonation" and "beer" and you will find out all you need to know about how these bubbles seem to appear from nowhere.
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