Using Bond Energy to find Enthalphy

[@iod353iw]

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.

[@hadiashafeeq8063]

U just nailed it mentor...

[@tofupowda]

for being the only person to properly explain this.

[@spaghettyih128]

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

[@davidschaaf6704]

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

[@TheThechels]

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

[@KirstieD]

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

[@fz2088]

What does "rock on" mean? Please elaborate, female.

[@DJTwitchify]

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

[@wendyzhou7618]

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

[@DanielaEsq]

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

[@Kang_Kapp0]

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

[@MWmDGC]

You are a life saviour!

[@cactus8911]

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

[@kentchemistry]

Happy to help!

[@XxJake4200xX]

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

[@StealthPlatypus1]

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.

[@annabanana8078]

+StealthPlatypus1 -243kJ/mole while his was -485kJ/2moles? i think that might be it

[@darrenconnor4444]

Thanks a lot buddy really helped me out.

[@lewishoanglong1610]

Very explicitly, thank you

[@saiveeru9344]

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

[@HotChip_Inc]

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

[@fatenbhm]

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

[@samparsons5253]

This helped so much! thank you

[@khalidalharbi2778]

thanks you so much... this helped me allllooooooooot!!!

[@sheyhan1]

Thank You, This was very helpful :)

[@davemckay4359]

I have trouble taking notes in chemistry, because everything is really big. Like the concepts are complicated. So I listen a lot to get it. But in class all I have is one time, get it or not. How can I take better notes in class, without having to write down every single step?

[@IndianaJ0e]

Read the book, watch videos on stuff BEFORE going to class. Makes a world of difference.

[@bramble482]

I use a lot of short hand and just write short phrases so that when I reread the book section I kind of get what's going on. I also draw pictures and diagrams if it's applicable. I also found study partners and I use youtube and google to explain concepts more in depth. In my book there are also section summaries that I use to help me understand what the objectives are that need to be studied.

[@912sonic]

How do u know oxygen is a double bond?

[@sumitgoel5778]

Is your average for chemistry below 50?

[@account4345]

Sumit Goel Why would you say this? What about insulting someone is so gratifying for you? Feel smart now putting someone who just needs an answer down?

[@spaceexplorer6105]

Oxygen has 6 valence electrons and 2 of which are pairs which means there are 2 lone electrons available to bond. This means it will double bond with another oxygen that has 2 lone electrons.

[@xXUniqueSunRaysXx]

that was fairly easy thx a lot

[@galwaygirl6003]

Thankew so much for this.... 😇

[@lxdomoxlful]

Thank you!!!!!! Thank you sooo soo much!

[@learnwhatyouwant9743]

Thanku so much sir it z really helpfull

[@iLadybear]

Thank you so much now I understand it :)

[@ericmkelley]

thanks for the video.

[@deenahovsepian3445]

but h2 Is in standard state.. don't we leave it as zero??

[@daniellesamson7447]

Deena Hovsepian I think that's enthalpy of formation

[@mvb4838]

Very helpful, thank you!

[@ScottySolace]

the cat at the end lmao

[@saiveeru9344]

thanks a lot bro......

[@masterch33se]

Thank you so much!!!

[@mansoormohammed6238]

It was too fast but I have understood,. Thank alot

[@darkbuzzer]

Thanks a lot.

[@Sujee03]

Thank you!

[@fz2088]

Why do you look like a chipmunk?

[@baptistejupet5759]

Great video, but I don't understand how you can know which side is bond breaking or bond making. Help anyone? :)

[@dudelarson]

+Jupet Baptiste In [2H2 + O2 = 2H2O], the broken bonds are 2H2 and O2, while the bonds made are 2H20. This equaiton is forming a bond, b/c you are combining 2 reactants and end up with one product, and this is an exothermic (-) process b/c you are reacting the two reactants together and end up with a more stable product...(they are releasing energy). If you wrote it in reverse, such as [2H20=2H2+02], this would be breaking bonds and would be endothermic, (+), b/c energy is needed to break up the stable bonded substance.

[@baptistejupet5759]

+B Les Thanks for your answer. Someone in my class told me that bond breaking is always and bond making is always the reactants is that true?

[@dudelarson]

+Jupet Baptiste No bond breaking is the reactants side and bond making is products side (you are making something new). In my lsat post I was talking about enthalpy (delta H), which at 19 seconds he says is easily confused...but a diff. concept. For this just remember you subtract the bond energires to the right of the arrow from the bond energies left of the arrow in the oequation.

[@baptistejupet5759]

+B Les yes that is what I meant before, I just missed out a word in sentence :/. Thank you for your help

[@dewifr3903]

could you help me to solve this problem, pleasee?? CH3CHCHCH3(g)+Cl2(g) -> CH3.CHCl.CHCl.CH3 thank you so much...

[@ehsunmalikmalik5043]

thank s man you a savor

[@ArthurSperotto]

Thank you!!!

[@trinityford4795]

omg i finally understand it

[@harrypotterismyman]

I love you.

[@davemckay4359]

thanks

[@wheresosama2792]

wow thanks:)

[@sumitgoel5778]

first of all its spelt as enthalpy ,u twot. And lastly enthalpy is calculated through the energy of the products subtract the reactants. NICE ONE!

[@monster7892]

haha I like how you use the calculator only for subtraction

[@amun6416]

incredib than u

[@kunkim8162]

genius

[@lingkejiang9244]

I heard cricket screaming and baby crying

[@Kofi_in_the_morning]

thanks dude who sounds like charlie sheen XD

[@adankish]

NEEERD jk thank you so much

[@shelovster3208]

But that is not enthalphy.. i.e.enthalpy...okey!!!

[@johnmarkramos1841]

Thank you!!