Using Bond Energies to Calculate Heats(Enthalpy) of Reactions

This tutorial describes how to calculate the heat of a reaction involving covalent compounds using bond energies.

[@justinv9413]

Make sure you always balance your equations. I just took a quiz and forgot to...

[@DaisyBoo123xoxo]

How do you know which bonds to break? Can someone please explain this to me

[@breannajarmin431]

broken bonds are bonds that are not formed on the product side. And formed bonds are bonds that are not on the reactant side.

[@elmerbarruera4546]

Great video to review with none the less. Thank you.

[@meln6842]

In the second example is the reason you didn't do the 3(c-H) and c-cl bonds on the reactant side is because on the product side there's also 3(c-H) and c-cl bonds?

[@Swanofthedead]

How do you know which bonds to break?

[@3ammotivationklipz]

How do you determine the bond energies of NH4Cl? the Chlorine isnt bonded to anything so do i ignore it?

[@kaangokbulak5538]

which source did you use to obtain the the bond energies? can you share your reference?

[@AgileNoob]

for bond energies its reactants(bonds broken) - bonds formed(formed) why if the equation before is products - reactants?

[@rafaeisenlohr]

wow!! thank you so much!! I finally understand this stuff!!

[@zooplankton5645]

Awesome sir

[@erhimanshusingh5572]

Plz upload shortcut trick for organic reaction

[@quantomic1106]

Nice video, keep it coming! :)

[@budaclees233]

Very helpful!

[@melissababoolal]

very very helpful

[@Edenchungkhoan]

-4788 should be the correct answer for the last problem. I'm appreciative though.

[@gulsengulsen9650]

I have a question. So basically what you while you use bond energy method, you do this ; Reactants - products, isn't it? So why you have written down products-reactants as another method. It is really confused me. Sorry if i have grammer mistakes or spellin mistakes that i might have

[@bulugumlingwa9745]

thanks 4 help us

[@lilcossby]

NICE

[@elmerbarruera4546]

Correction to video: in C6H6 + O2 -----> CO2 + H2O the correct way to balance the equation is
2 C6H6 + 15 O2 -----> 12CO2 + 6H2O

[@patzyvillagrana7166]

I thought the correct way was C6H6 + 7.5 O2 ---> 6 CO2 + 3 H2O

[@morv1891]

thanks

[@hunjaja1054]

Break the ones that were on the reactant side but not on the product side.

[@chloelim4]

yayay