5.3 Bond enthalpies (SL)

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This video covers how to calculate the enthalpy change for a reaction using average bond enthalpies.

Link to worksheet:

Table of average bond enthalpies (Copyright IB)
  1. Mike Sugiyama Jones (MSJ Chem)
  2. Enthalpy
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Hi sir, thank you for your videos - they are extremely helpful! Just wondering though, how do you know when to use data for enthalpy of formation and when to use bond enthalpy data? Sorry, stupid question - it's just that I can't get my head around it.

Thank you in advance!

LFCdiehard
Автор

Good job! :D
You have a small mistake though..
At 1:42 it should be ΔΗ = 4(414) + 2(498) - 2(804) - 4(463)
or ΔΗ = 4(414) + 2(498) - [2(804) + 4(463)]

Greetings from Greece

panos