Using Bond Energy to find Enthalphy

This short video shows you how to calculate the enthalphy of a reaction (delta H) using bond energies. Delta H=broken minus formed
Example problems:
Combustion of Hydrogen
Combustion of Propane

[iodiw]

My personal favorite thing about this is that you use the calculator for the subtraction at the end, but not for the multiplication that was arguably harder.

[shokuraikimdragon]

My learning modules were stressing me out with how the teacher didn't explain how to do this even though it ended up on every assignment i got. You have no idea how grateful i am to you. I want to kick myself with how easy this is.

[tofupowda]

for being the only person to properly explain this.

[TheThechels]

Holyy youre so good at breaking things down..thank you so much.. im now ready for my test

[spaghettyih]

THANK YOU SO MUCH. i was so confused about this because my chem book didn't explain this at all but now bond enthalpy calculations make PERFECT sense now so THANK YOU THANK YOU YOU SAVED MEEEE

[davidschaaf]

Brilliant! this video was very short and sharp, thank you so much you have no idea how much this video helped!!

[KirstieD]

This was SO helpful, why don't you have more views? This totally saved my ass haha rock on

[wendyzhou]

This definitely helped. Thank you so much I wish I have a chemistry teacher like you

[kappobetz]

omg, this actually helped so much! very easy to understand, ty

[DanielaEsq]

Thank you so much, I´m studying by myself and the explanation really helped.

[DJTwitchify]

I'm confused as to why we don't use Hformed - Hbroken. After all, isn't delta products-reactants?

[cactus]

thanks man. i was always mixing up formation and bond energy.

[darrenconnor]

Thanks a lot buddy really helped me out.

[fatenbhm]

Thank you bro ! that was so helpful !!!!

[StealthPlatypus]

I just had a question that was your exact first example, and the answer he put was the one you (and what I calculated too) divided by two. So like where the delta H is -485, the prof's answer was -243. Any reason for this? I can't figure it out.

[HotChip_Inc]

THANK YOU!!! my chem professor is going to test us on this but never even went over it, smh

[XxJakexX]

one question. In the combustion reaction why did you multiply the right side coefficients by 2?

[saiveeru]

bro do u have any shortcut methods for solving in competative exams

[iLadybear]

Thank you so much now I understand it :)

[learnwhatyouwant]

Thanku so much sir it z really helpfull