Bond Dissociation Energies (BDE) help, please

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SUMMARY

The discussion centers on calculating bond dissociation energies (BDE) for a lab report involving the combustion of a triglyceride (C57H104O6, 885.4 g/mol). Participants emphasize the importance of understanding that breaking bonds requires energy while forming bonds releases energy. The calculations needed include net energy absorbed or released per mole and per gram of triglyceride, as well as converting this energy into Calories. A helpful resource was provided for further understanding of enthalpy calculations from BDE.

PREREQUISITES
  • Understanding of bond dissociation energies (BDE)
  • Knowledge of enthalpy and thermodynamic principles
  • Familiarity with combustion reactions
  • Basic chemistry skills for mole and gram conversions
NEXT STEPS
  • Study bond dissociation energy calculations in detail
  • Learn how to calculate enthalpy changes using BDE
  • Research combustion reactions and their thermodynamic properties
  • Explore resources on energy conversion between kJ and Calories
USEFUL FOR

This discussion is beneficial for chemistry students, particularly those working on lab reports involving thermodynamics and combustion reactions, as well as educators seeking to clarify concepts related to bond dissociation energies.

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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!
 
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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"
 
Last edited by a moderator:
siddharth said:
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?
 
Last edited by a moderator:

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