Bond enthalpy and enthalpy of reaction | Chemistry | Khan Academy
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- Опубликовано: 23 июл 2024
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Introduction to bond enthalpy, and how to use bond enthalpies to calculate enthalpy of reaction.
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Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a first-year high school or college course, and a good understanding of algebra is helpful.
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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
When her mouse handwriting is better than my pencil handwriting.
Im guessing she uses a tablet but still its really neat :P
@@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.
Jeffrey Huang she might have it set to relative and not absolute
@@jeffreyhuang3814 She could have moved her hand
@@meatsupplies5282 😁👻
she talks cute omg!
why
She wear glasses
this was a very helpful review for me, I sure appreciate this
great teaching skill.full clarity.
This was super helpful, thank you!
😊
Awesome video. You guys always make quality stuff.
Nice video.Helpful to me I'm in class ix .This video topic make me very easier.
Thankss!
Thank you so much,it was really helpful
Nice video. Explained succinctly, pace is excellent,
Thank you so much and really good 👌👌👌
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👍🏾👍🏾
Hello
At what Bond disscociation Energy is a bond considered stable? Is 40 kJ/mol a stable bond?
very clear thanks
you saved me thank you
Great video, helped a lot. Thank you!
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
Handwriting is so beautiful
I finally get why I was getting my answer wrong....I was calculating ALL of the bonds and not just the ones that changed
btw why aren't the C-H bonds in reactants taken into account?
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.
I reckon you did an amazing job whoever you are !
Thanks for teaching me something new😍
its a really good video , helped me a lot..
Awesome writing
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?
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
This is gen chem 1 ali, chill
Thanks alot. I could never understand the numerical by myself.
your handwriting and organization are high key way better than Sal's
Whoa, shots fired
thanks
I love this explanation and your handwriting is amazing! :-)
Do you also sell propane accessories?
it is the amount of energy required to break all bonds in 1 MOLE OF A SUBSTANCE. but it was a nice video :)
Bond formation is an energy absorbing process ri8 ? I m confused
Bond formation releases energy... Right???
Because of overlapping of atoms (electrons)
Lovely.... 👍
Dont u have to balance the rxn?
why is energy released when a bond is formed? I can't conceptualize it.
What do you mean by '1 mol of a bond'?
Maybe she means "the number of bonds within one mole of a given molecule"? I'm honestly not sure.
best video ever
Like who have biggest thermodynamics chapter in 12th...I have 45pages...
kickboxing chemistry can be a combo
what if it's in a soild form?
I really had to force myself to stop focusing on how cute she talks and rather listen to whats she's talking about.
i get it man
bro is down horrendous 💀
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.
i only watched this because her voice is cute
popcorn xd
pretty
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.
great
hi isnt the c-h bond 8 bonds ?
A beautiful vedio contains a beautiful handwriting and a beautiful voice with a beautiful explanation
bro its video not vedio.
She has a pretty voice and handwriting
I hate chemistry. Its so frustrating
maitabasa ndakunzwisisa manje
did you just write 'hess's law' instead of 'hess' law' 😮
I prefer sal
joe bloggs sal is GOWD
Anas way more
I don't get it lol
LOL
😰😵😨😲😛😩😣
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.
haters gonna hate..
This woman sounds like the woman from that channel about ADHD. Can’t remember. She calls her followers “brains”
brother what 😭
really good handwriting, Her voice lowkey annoying thoo
bro
u mean u cant concentrate. yeah me 2
@@jasonthomas9975 i ended up getting 85 in this class lmao