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Homework Help: Thermal Expansion of Water

  1. Aug 12, 2010 #1
    1. The problem statement, all variables and given/known data
    Hello, I'm doing a lab on the Thermal Expansion of Water. I went through the whole lab and got good data based on the the proposed theory however I didn't record the initial height of the water in the pipette.

    The set up looked like this: http://science.lms.athabascau.ca/file.php/20/images/exp2_pic04.jpg

    Here's the data I recorded:
    Temperature (C) vs height (cm)
    1) 0.5 (^o C), 15.7 cm
    2) 2.6, 15.6
    3) 3.7, 15.5
    4) 5.7, 15.6
    5) 8.4, 15.7
    6)10.1, 15.8
    7)11.7, 15.9
    8)13.8, 16
    9)22.7, 16.5
    10)28, 17

    Since I'm doing this home lab, just want to make sure my numbers look good. And also, based on the numbers, what would be an appropriate initial height (of water in the pipette) be?
  2. jcsd
  3. Aug 12, 2010 #2
    The links are inaccessible to us. They require username and password.
    Initial height? You mean the height at 0 C? Apply the formula: [tex]h=h(0)(1+\alpha \theta)[/tex], plot the graph [tex]h(\theta)[/tex] and you will find h(0).
  4. Aug 12, 2010 #3
    Oops, sorry.No, I mean the initial height of the water before it is cooled (when it's at room temperature)
  5. Aug 12, 2010 #4
    http://img835.imageshack.us/img835/976/exp2pic06.jpg [Broken]

    That's the set up. The water is originally at room temp, and then ice and salt are added to the bowl surrounding the glass bottle
    Last edited by a moderator: May 4, 2017
  6. Aug 12, 2010 #5
    Because from 0-4 C, water is compressed while temperature goes up, so leave the data from 0-4 C aside, as we only consider the expansion of water.
    What's the formula of the proposed theory anyway?
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