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Gas laws

  1. Mar 15, 2005 #1
    Why is it that when you place a test tube over a burning candle in a peatree dish with water, that the candle goes out and then the water from the dish rises into the test tube. Mainly what are the reasons that the water rises. I am kind of going with the "temperature and pressure are related" idea but I am not quite sure if that is right. Thanks for the help!
  2. jcsd
  3. Mar 15, 2005 #2


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    My guess is that by closing up the system, the temperature increases, compensated by the dramatic decrease in volume.
  4. Mar 15, 2005 #3


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    Staff: Mentor

    Candle uses all oxygen and goes off. Produced carbon dioxide solves in water and that's why gas volume in the test tube decreases - and water goes up.
    Last edited by a moderator: Aug 13, 2013
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