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Volume of bubble

  1. Dec 3, 2006 #1
    1. The problem statement, all variables and given/known data

    A bubble with a volume of 1.00 cm3 forms at the bottom of a lake that is 30 m deep. The temperature at the bottom of the lake is 20°C. The bubble rises to the surface where the water temperature is 35°C. Assume that the bubble is small enough that its temperature always matches that of its surroundings. What is the volume of the bubble just before it breaks the surface of the water? Ignore surface tension.

    2. Relevant equations


    P1V1/T1 = P2V2/T2

    3. The attempt at a solution

    P2 = 1atm
    P1 = 1 atm + 1000 * 9.81 * 30 => 3.943atm

    3.943atm*1cm3/20C = 1atm*V2/35C

    This value for V2 is way too big, where did I screw up? Thanks
  2. jcsd
  3. Dec 3, 2006 #2


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    Staff Emeritus
    Science Advisor
    Gold Member

    You've used celcius instead of absolute temperature.
  4. Dec 3, 2006 #3


    3.943/293 = V2/308
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