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Homework Help: Bond Dissociation Energies (BDE) help, please!

  1. Apr 26, 2006 #1
    Well, I'm working on a lab report for my general chemistry class, and we're supposed to answer questions on bond dissociation energies, but we never even discussed that during the lecture. I cannot find any information on it in my textbook, and I am really lost on how to answer these questions. Basically, I have the combustion of a triglyceride with oxygen, and I have to calculate:

    a. the net energy absorbed or released (kJ), per mole of triglyceride
    b. the net energy absorbed or released (kJ), per gram of triglyceride (C57H104O6 885.4 g/mol)
    c. the net energy absorbed or released (Cal), per gram of Triglyceride (1 Cal = 4.184 kJ)

    If anyone is able to help me solve these, please let me know! Thank you!
  2. jcsd
  3. Apr 26, 2006 #2


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    Homework Helper
    Gold Member

    Do you know how to calculate the enthalpy of the reaction from bond dissociation energies?

    Here's a hint. Breaking bonds requires energy, while making bonds releases energy

    This link should help you.
    http://www.science.uwaterloo.ca/~cchieh/cact/c120/heatreac.html" [Broken]
    Last edited by a moderator: May 2, 2017
  4. Apr 26, 2006 #3
    Okay, I'm reading this, but I am completely lost. I haven't heard about BDE until yesterday. Would you be able to explain more?
    Last edited by a moderator: May 2, 2017
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