Bond enthalpy and enthalpy of reaction | Chemistry | Khan Academy

[@musabzulfiqar]

great video. Screw the haters, they will complain about literally anything but have no ability to do anything else. I'm a university student and this helped me

[@thecocomidget]

When her mouse handwriting is better than my pencil handwriting.

[@2030games]

Im guessing she uses a tablet but still its really neat :P

[@jeffreyhuang3814]

@@2030games If you look at 0:23 she moves her cursor to the left to write. So I'm guessing it is mouse handwriting, as opposed to tablet handwriting.

[@meatsupplies5282]

Jeffrey Huang she might have it set to relative and not absolute

[@aufspider4136]

@@jeffreyhuang3814 She could have moved her hand

[@venomxxx4290]

@@meatsupplies5282 😁👻

[@josephcohen734]

Awesome video. You guys always make quality stuff.

[@digantogaming]

Nice video.Helpful to me I'm in class ix .This video topic make me very easier.

[@safa4036]

she talks cute omg!

[@aufspider4136]

why

[@godhelpme8977]

She wear glasses

[@SeekTheTruthAndTruth]

great teaching skill.full clarity.

[@shivanimistry2982]

Thank you found this really helpful, I'm a first year student and it's nice to understand it the way you've explained it keep it up👍🏾👍🏾

[@ProGamer-wm9su]

Hello

[@HOMECINEMAMOVIENIGHT420]

Thank you so much and really good 👌👌👌

[@m.prophet4663]

Nice video. Explained succinctly, pace is excellent,

[@Garryp0tterr]

Thankss!

[@samuelmorris1035]

Super helpful!

[@sciencenerd7639]

this was a very helpful review for me, I sure appreciate this

[@yvonnegranger7334]

Thank you soooo much!!! Just started learning about thermodynamics at university and this has helped immensely would probably not pass if it weren't for you guys

[@imani_8021]

I finally get why I was getting my answer wrong....I was calculating ALL of the bonds and not just the ones that changed

[@AliVeli-gr4fb]

Thank you nice explanation. I may add a few things. bond breaking requires energy because in bound state,total mass of bound atoms are actually lower than total of mass when they are free. so we need to give energy and they take this energy and convert to their mass. Einstein's formula.. I think there are very deep relations down there but everything is nice

[@saidmilano5022]

This is gen chem 1 ali, chill

[@zayed5763]

you saved me thank you

[@zquadzquad6856]

Handwriting is so beautiful

[@gg3675]

your handwriting and organization are high key way better than Sal's

[@bradydiscgolfwatson2125]

Whoa, shots fired

[@fredweker9106]

At what Bond disscociation Energy is a bond considered stable? Is 40 kJ/mol a stable bond?

[@virupannamedikinal]

Thank you so much,it was really helpful

[@sinekonata]

I got it upside down so I recap here: You used 1707kJ to cut bonds. Cutting bonds is less stable with higher potential, requires energy to maintain. And got 1998kJ from making bonds. Making bonds is more stable, releases energy.

[@ahmedezzat687]

very clear thanks

[@rodolfog2948]

Great video, helped a lot. Thank you!

[@huzaifarana3920]

it is the amount of energy required to break all bonds in 1 MOLE OF A SUBSTANCE. but it was a nice video :)

[@aryadamle8772]

btw why aren't the C-H bonds in reactants taken into account?

[@garimaagarwal985]

The C-H bonds in the reactant are not broken and retained in the product. So even if you consider the bond dissociation enthalpy in reactant, you will have to consider bond formation enthalpy in product and being opposite in nature these would just cancel out.

[@arbindapandey1711]

Thanks alot. I could never understand the numerical by myself.

[@umeshkrishna5908]

Awesome writing

[@sinekonata]

Why is the bond enthalpy for triple C-C bond lower than 3 C-C bonds? Shouldn't it be even easier to sever the last bond than the 1st and second of the 3, since the Cs would be closer together when triple bonded?

[@EdreaGlmr]

Thank you, although I have to say this video has a lot of mistakes in the narration, several times the voice says something that is not correct (like in time 8:20 is not the bonds that are broken but the ones that are formed...) maybe you don't care but if this comment has any help for you to get better videos in the future it would achieved its purpose.

[@Sameer-sx7ek]

great

[@detectivebrown4499]

hi isnt the c-h bond 8 bonds ?

[@bluesky8806]

I really had to force myself to stop focusing on how cute she talks and rather listen to whats she's talking about.

[@jasonthomas9975]

i get it man

[@Sunnybruh]

bro is down horrendous 💀

[@zeinamazin3743]

I love this explanation and your handwriting is amazing! :-)

[@umaireasyhojao]

Thanks for teaching me something new😍

[@harshitapaila3392]

its a really good video , helped me a lot..

[@tones-q7q]

I reckon you did an amazing job whoever you are !

[@Music-zx4po]

Would somebody oblige to explain the case of a dimer formation as in Diargon where Electron Affinity is positive. Would H still be negative, i.e. that formation still be considered as releasing energy?

[@rajatpatel4657]

thanks

[@aparadeetyadas953]

Dont u have to balance the rxn?

[@sumyiamujahid9765]

Bond formation is an energy absorbing process ri8 ? I m confused

[@nofaceman2571]

Bond formation releases energy... Right???

[@nofaceman2571]

Because of overlapping of atoms (electrons)

[@coloredpandas1993]

Hahah I get it!! Thank you so much!!! I find you better than Sal. I can't stand his uhhh's and the constant repeating of a sentence when he changes his colors. I mean I do love Sal but you're like the sister-in-law that you love more than your brother if you understand.

[@jeremystott6861]

best video ever

[@tonytomei2843]

Do you also sell propane accessories?

[@fundamentalscience2335]

Lovely.... 👍

[@juliakim8226]

What do you mean by '1 mol of a bond'?

[@phillwithskill1364]

Maybe she means "the number of bonds within one mole of a given molecule"? I'm honestly not sure.

[@naif277]

i only watched this because her voice is cute

[@rogerharsh]

Like who have biggest thermodynamics chapter in 12th...I have 45pages...

[@qhazadetaileddescription8730]

why is energy released when a bond is formed? I can't conceptualize it.

[@multimeme5935]

because the bonded molecules are now in lower energy state, molecules are bonded to do that (to minimize their energy and become stable).

[@b_08_amitkumarsahu90]

kickboxing chemistry can be a combo

[@Anas-nu7io]

I prefer sal

[@junaidmughal3806]

joe bloggs sal is GOWD

[@vvsparis]

Anas way more

[@rajatmeena7341]

A beautiful vedio contains a beautiful handwriting and a beautiful voice with a beautiful explanation

[@jasonthomas9975]

bro its video not vedio.

[@joshiifruit5554]

She has a pretty voice and handwriting

[@nafisamamun4232]

I hate chemistry. Its so frustrating

[@Jcknight7996]

what if it's in a soild form?

[@JaceTimes]

Incorrect: I kept getting the wrong answers and its because you are suppose to add the bonds formed then subtract it from the bonds broken instead of subtracting the bonds made.

[@michaelapinkturtle4210]

did you just write 'hess's law' instead of 'hess' law' 😮

[@shrutishete6456]

pretty

[@forttimese]

popcorn xd

[@itsadelaine9048]

maitabasa ndakunzwisisa manje

[@michellec.4291]

I don't get it lol

[@2ndintelligentWorld]

LOL

[@vvsparis]

really good handwriting, Her voice lowkey annoying thoo

[@jasonthomas9975]

bro u mean u cant concentrate. yeah me 2

[@vvsparis]

@@jasonthomas9975 i ended up getting 85 in this class lmao

[@yunus2626]

haters gonna hate..

[@farooqfarooq6742]

😰😵😨😲😛😩😣

[@madelinemcdonald2609]

This woman sounds like the woman from that channel about ADHD. Can’t remember. She calls her followers “brains”

[@jayceel251]

brother what 😭

[@gabymendez7238]

This was super helpful, thank you! 😊