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B Gravitational differentiation

  1. May 13, 2016 #1
    Does methane gravitationally differentiate in air, or does fluid dynamics mess things up & make it mix in with the air?
     
  2. jcsd
  3. May 13, 2016 #2

    mathman

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    Both. Methane has molecular wt. approx. 16, while oxygen and nitrogen have molecular wts. of 32 and 28, so the methane would slowly rise when the air is perfectly still. However the air is never perfectly still, so wind,etc. tends to mix things up.
     
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