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Homework Help: Problem with Thermal expansion: volume

  1. Feb 13, 2009 #1
    1. The problem statement, all variables and given/known data
    The temperature of a block of lead is raised from 0°C to 100°C. What is the percentage change in its density? (The density of lead at 0°C is 11,300 kg/m3.)


    2. Relevant equations
    ΔV = Vi βΔT


    3. The attempt at a solution
    it gave the wrong answer when i tried to use the above equation
     
  2. jcsd
  3. Feb 14, 2009 #2

    LowlyPion

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    Homework Helper

    What did you use for β?

    Is that a given in the problem?

    I'm used to seeing β used for compressibility.

    If you are using α the thermal expansion coefficient, you may need to account for expansion in 3-D, which corrects the linear α to volume α with the factor 3.

    αv ≅ 3*αL

    http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/thexp2.html#c3
     
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