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What is the equation for Water Expansion when

  1. Aug 16, 2009 #1
    What is the equation for Water Expansion when ....

    Hi all,

    I know that water expands when heated above room temperature.

    I just need to know what equations govern this expansion. For example, lets say I add x amount of heat, then water expands x amount.

    Is it linear? Is there a maximum amount?

    Any links on reading would help.
     
  2. jcsd
  3. Aug 16, 2009 #2
    Re: What is the equation for Water Expansion when ....

    Coefficient of thermal expansion
     
  4. Aug 16, 2009 #3
    Re: What is the equation for Water Expansion when ....

    Ok, I found this equation on wikipedia.

    dV / Vo = 3*alpha* dT

    T: temperature
    V: Volume

    It gives in a chart for water that 3*alpha is 207E-6 per C at 20 degrees C.

    Does that mean that the change in volume (dV) will be 3*alpha*dT*Vo? That seems pretty linear.

    The link here: http://www.plumbset.co.uk/waterexpansion.htm [Broken]
    gives a calculator for water expansion and the chart they give (if you click the link) looks nonlinear.

    If I am trying to come up with a equation that gives me the amount of expansion if given the temperature what must I do.
     
    Last edited by a moderator: May 4, 2017
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