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What are those bubbles in my beer?

  1. Apr 21, 2007 #1
    I heard alcohol evaporates, also the carbon dioxcide pop does the samething, am I loseing alcohol percentage when I let my beer stand?
  2. jcsd
  3. Apr 21, 2007 #2


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    Judging by your typing skills, I'd venture you're still getting plenty.

    - Warren
  4. Apr 21, 2007 #3
    No. It would take a very, very, very long time for any chemical reaction to take place. People often forget that alcohol isn't like other drugs like THC or Ex in which the active ingredient has a very small mass...Alcohol takes up a lot of space. In some spirits (100 proof) the alcohol itself takes up 50% of the volume. Unless your beer is shrinking, I'd say you're safe.
  5. Apr 22, 2007 #4


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    Most of it is carbon dioxide, ethanol has a considerable vapor pressure so yes, some ethanol is evaporating out of the solution, however not as fast as the carbon dioxide although I wonder just what role carbon dioxide has, if any, in keeping the ethanol in the solution.
  6. Apr 23, 2007 #5


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    Im pretty sure its carbonated just like soda pop to help slow down the reactions that might occur that would make it taste bad before you had a chance to drink it. Also I think that people prefer the taste of a carbonated beverage over a "Flat" one because it has a taste people relate to "fresh".

    I would have to guess that 99.9 percent or so is o=c=o and the other .01% CH3-CH2-OH of what evaporates by the time you drink it. Actually the EtOH is probably a bit higher because i know beer smells really strong sometimes.

    I could be wrong though on the first part..... oh look at the time its beer thirty. Time to go drink!
    Last edited: Apr 23, 2007
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