Bond Dissociation Energies (BDE) help, please

[FlipStyle1308]

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!

 

[siddharth]

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"

 

[FlipStyle1308]

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"

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?