Introduction to kinetics | Energy and enzymes | Biology

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Introduction to kinetics | Energy and enzymes | Biology | Khan Academy

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Күн бұрын

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Kinetics, activation energy, activated complex and catalysts.
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Пікірлер: 101

@kamrannasir3871 12 жыл бұрын

I wish my school teacher would have been half as good as this..

@77sarahcat 9 жыл бұрын

"iogen"

@LiqMiPenny 13 жыл бұрын

Ah, so helpful with my classes. Didn't have a clue what the teacher was talking about, but now I have a better idea.

@hiccuphadock5059 8 жыл бұрын

sals the best teacher out there

@frederickrichard1718 4 жыл бұрын

the most recent comment here is 4 years old lmao

@parkmeadow 3 жыл бұрын

@@frederickrichard1718 not anymore xdd

@DJDunsie 11 жыл бұрын

OMG you are the best chemistry teacher ever :D I never understood this before, now I do, all thanks to you.

@hgfjyrdetryu 12 жыл бұрын

KHAN ACADEMY ROCKS!!!!!!!!

@xxjman1217xx 10 жыл бұрын

How come you never did Rate Laws?

@danymanchster1759 10 жыл бұрын

rate law and reaction order and all that good stuff

@babypink1021 12 жыл бұрын

Thanks. PS: those people who are correcting him... if you know so much, why are you even watching this?! geez

@Dschulinho 12 жыл бұрын

thx man. your a good teacher, and you are a good guy, lessons for free your are awsome. thanks man

@FindWaldoAgain 12 жыл бұрын

I finally understand! Thank you!

@zeehanazad 12 жыл бұрын

i reeeeeallyyyyyy love ur academy, you have know idea how helpful your videos have been!

@EaglesFastAndLow 11 жыл бұрын

Khan for president!

@Pr0x1mo 15 жыл бұрын

I know you just put this up, but can you put these videos in sequential order with the rest of your chemistry section? I have no idea which video comes after this one.

@xeztan 8 жыл бұрын

@sumbumfit 10 жыл бұрын

You are an amazing explainer!!! Thank you, you've helped me with sooo much1

@42230004 12 жыл бұрын

I was looking for the musics by kinetics and stumbled upon this video. I watched the whole thing. Good job and thanks. It made alot of sence bc i learned chem last year but we never did kinetics. Anyways keep up the good work

@DBZGotenStan 12 жыл бұрын

Hydrogen boding with iodine - Still a better lovestory than twilight

@42paradigms 11 жыл бұрын

1. Change in concentration 2. Change in temperature 3. Change in surface area

@edenabraham10 9 жыл бұрын

Great way to understand the concept!

@seannykaza9954 11 жыл бұрын

Question 1. Yes, because for a molecule to be formed there must be an effective collision between its constituent atoms. Question 2. Think of it this way, if you powder something it gives more area for the other atoms or molecules to collide with it. But, if you leave something in a brick the atoms or molecules that need to interract with it are only limited to the molecules of the substance on the surface. So thus the more area available for the reaction to take place the faster the reaction.

@CaitlinB0000 12 жыл бұрын

I'm just slightly confused by the graph you created to explain activated state and activation energy. On the video, you labeled the y-axis potential energy, but later you referred to heat helping to get up to the activated state. Does the y-axis just represent energy in general, or does heat have a way of changing potential energy that I am not familiar with? (It's late, I hope my question makes sense.) By the way, thanks for all the great videos!!!

@hgfjyrdetryu 12 жыл бұрын

intermolecular activity is not considered as a chemical reaction but a physical reaction instead since phase changes (solid -> liquid) are not chemical. however im only saying that the dissociation of NaCl APPEARS similar to dissociation when melting a pure peice of salt. one is caused by addition of energy, exciting the salt, the other is caused by dipole-ion forces. (see next post)

@hgfjyrdetryu 12 жыл бұрын

i dont think its a chemical reaction since NaCl is an ionic solid meaning each atom is already ionized and independent. the interaction between Na and Cl seems more intermolecular than intramolecular to me because each Na+ ion is not stuck to or permanently designated to a specific Cl- ion, you could melt a pure piece of salt and the Na+ and Cl- ions could be rearranged without going under a chemical reaction (NaCl(s) -> NaCl(l)). (see next post)

@manojmaheshwari4055 3 жыл бұрын

11 years back .. amazing what I feel now !

@yinghouguan5591 9 жыл бұрын

Can anybody recommend me a page or book where i can i find worked examples in chemical kinetics?

@JafenKtair 9 ай бұрын

feet

@hgfjyrdetryu 12 жыл бұрын

i think what causes dissociation is key here and if dipole-ion forces are considered as a physical process instead of chemical, then dissociation of salt in water is a physical process.

@NASSAfellow 12 жыл бұрын

@Jordan5066 Just to note that although his equation was balanced, he said "two moles of hydrogen" and "two moles of iodine" which was technically incorrect since H2 is a mole in itself, and the same goes with I2. Correct phrasing: One mole of Hydrogen and one mole of iodine make 2 moles of Hydrogen iodide. H2 is one molecule, and I2 is also a single molecule. It was a long time ago but maybe I was trying to get at that.

@chissstardestroyer 2 жыл бұрын

Reason if the temperature increases the likelihood increases is simple: temperature at the atomic scale really is the ambient energy of the atoms; so the higher the temperature, the more active they are, and the more likely they are to collide with higher force. Course these things never collide, and the reason for that is at the scale they are at, the electromagnetic force is easily sufficient to stop them from impacting; had they impacted, you'd have a nuclear explosion- and that'd be really bad for the scientists in the lab to put it mildly, as well as the lab in question. Frankly; I doubt very strongly you'd find anything left of the scientists or their experiment if that happened. And that's *if* you can even go near there; due to the radioactive nature of the area post an atomic explosion, as well as finding the epicenter thereof.

@pixxzel 11 жыл бұрын

if somebody could please answer this it would be great. What are the three different ways that the rate of a reaction can be affected, described in the video?

@say1226 11 жыл бұрын

well that is a bold assumption because it is different teaching something you know than to answer questions written by others in different manners. Although he would most likely do very well he would probably be prone to making a few errors due to wording or style of the question eventhough he understands the concepts

@FauItyLogic 13 жыл бұрын

@Pr0x1mo There are playlists on the youtube channel. Makes watching continuous.

@sciencenerd7639 2 жыл бұрын

great video, thank you so much

@noledjokovic1368 11 жыл бұрын

This guy would get a perfect score on the MCAT

@name.7098 2 жыл бұрын

What is MCAT?

@MrYasser643 12 жыл бұрын

Search for it>i didnt cuz i dont need to watch it,i've already studied it,search for it.

@funkydiva12 12 жыл бұрын

hey which is the video that teaches us about the rate determinign step?

@sequence0902 9 жыл бұрын

NaCl and water forms ion dipole interaction and not polar dipole bonds, no?

@KawaiiStrawberry33 11 жыл бұрын

I didn't think probabilistic was a word, but apparently it is!

@NASSAfellow 12 жыл бұрын

@Jordan5066 Silly mistake from me - at the time I must have been a bit tired (was doing a hardcore chemistry enhancement course which was really energy draining). Thanks Jordan.

@cloonex1 12 жыл бұрын

Very well presented, however a bit slow to the point

@hupper12345 14 жыл бұрын

iogen lol thanks dude

@chissstardestroyer 2 жыл бұрын

These chemicals aren't operating by chance; they are attracted to eachother via electromagnatism- very strongly attracted at that; they are frankly pulled together, due to the electrical charges in the subatomic parts of the atoms.

@jijulpark3703 11 жыл бұрын

you sound like anthony bourdain

@Pr0x1mo 14 жыл бұрын

Nah, np, a couple hours after i posted that (4 months ago) he put it into a playlist.

@shyambhavi10 3 жыл бұрын

This is the oldest comment that I ever saw on utube

@Pr0x1mo 3 жыл бұрын

@@shyambhavi10 I'm still here, B.

@shyambhavi10 3 жыл бұрын

@@Pr0x1mo woah! I didn't expect a reply... btw great:)

@Pr0x1mo 3 жыл бұрын

@@shyambhavi10

@MphatsoLiandisha 10 ай бұрын

This year too?

@faeinthebay 11 жыл бұрын

Works fine for me.

@CliveReyes 13 жыл бұрын

He put the dot on the C.. haha!

@joshuapumarol 11 жыл бұрын

Saves my life every time

@prospectivemedic3750 4 жыл бұрын

Hi Sal, or anyone else on this episode. Am i missing something by asking this? How do you get from H2 ----- I2 = 2HI? I feel like I am not understanding this part of the process or have missed something from earlier episodes

@prospectivemedic3750 4 жыл бұрын

As in, if I was given 2HI in a formula, how does H2 + I2 = 2HI? Thanks

@prospectivemedic3750 4 жыл бұрын

Unless there is a lecture on Chemical equilibrium I have missed?

@username6333 13 жыл бұрын

@Pr0x1mo Go to his site, the videos are in sequential order there.

@Sk.2500 13 жыл бұрын

I'm here because I was hearing drum n bass and I tought this was dnb too, dang school shit is chasing me ahhhhhhhh

@SlushGuppy 12 жыл бұрын

What will Oxygen think!? Oh man, this is getting good.

@racquelsabesaje4562 2 жыл бұрын

hydrogen mix other chemicals had active effects either effective

@sunitatailor6434 8 жыл бұрын

its epic

@u218064 13 жыл бұрын

isn't it decrease surface area to increase rate of rxn????

@minde6794 11 жыл бұрын

and addition of catalyst..

@sub-zero9772 10 жыл бұрын

very good

@vijayjuneja8534 11 жыл бұрын

thnxx...........

@fleshcookie 12 жыл бұрын

6:28. Highagen Iodide? I thought it was hydrogen

@MrYasser643 12 жыл бұрын

Its an introduction to Kinetics..not explainin' of thermodynamic!..u can find what u want in next videos Senior

@NASSAfellow 13 жыл бұрын

In the beginning of the video you said '2 moles of hydrogen and 2 moles of Iodine' WRONG! It is one mole of hydrogen and one mole of Iodine which produces two moles of HI. You have two atoms of each, not two moles.

@dawangstaman 10 жыл бұрын

watched

@curtpiazza1688 11 ай бұрын

Great! 😂

@bensonwu1238 5 ай бұрын

Why is it Chemistry?

@td6063 10 жыл бұрын

hydrogen is like a confused chick between two guys

@ThePeterDislikeShow 11 жыл бұрын

Don't drink soda.

@Pr0x1mo 13 жыл бұрын

@15987532147896325 I know the original website, but when this video first came out, it wasn't in order with any other video, it is now, obviously.

@Kafka121 2 жыл бұрын

ah yes the all new Iogene

@badamc 11 жыл бұрын

there's no audio.... anybody else?

@0o0o0123 12 жыл бұрын

Kinetics? You were going on too much about thermodynamic bro, better of explaining rate determining step, the rate expression and constant and order of reactions, video was good but irrelevant to kinetics

@peacefindersimply5001 6 жыл бұрын

Your thinking of kinetic energy, kinetics is a bit different