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Homework Help: What exactly is heat of combustion? How would I calculate it?

  1. Apr 1, 2009 #1
    1. Calculate heat of combustion for butane. Given:

    mass water- 129.91g
    mass butane 0.15g
    old temp- 16.4 degrees C
    new temp.- 26.7 degrees C

    2. Relevant equations

    2C4H10 + 3O2 yields 8CO2 + 10H2O

    3. The attempt at a solution

    I've tried, but I really have no idea. I only know how to calculate q and apparently that's not the same.
  2. jcsd
  3. Apr 1, 2009 #2


    User Avatar

    Staff: Mentor

    Heat of combustion is per mole, what you have calculated is for 0.15g...
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