What IS activation energy, really?

[@KevinArdala01]

Yes, reversible reactions video please! 👍

[@brucegoodwin634]

Yes to all your topic suggestions. I'm on a undergraduate chemistry binge. Super lectures!

[@vedangarekar1390]

I'm genuinely enjoying learning chemistry from this channel more than I've ever done. Maybe it's something about the approach differs in how the content is put forth I think.

[@G5rry]

This glass will "spontaneously" fall to the ground after I push it off the table.

[@robertstuckey6407]

A cat wrote this

[@jjreddick377]

Correct.

[@ThreeTwentysix]

Yes. The crucial word there is 'after'. So, as @robertstuckey6407 said, you can't blame the cat.

[@kapsi]

It means you don't need to keep pushing it to the ground

[@dominicestebanrice7460]

t's a poor word choice IMHO but we're stuck with it seems; it's definitely a source of confusion for students. When we say "spontaneous" in general usage we typically don't mean "self sustaining once activated'!

[@HyenaEmpyema]

Your channel is a great 2nd-3rd level dive into the physical sciences. I've been watching a ton of physics stuff on youtube, to the point that they are becoming repetitive (Ii'm still extremely thankful for them!). Then I found your channel and I feel like I'm leveling up from all the other great material scientists have contributed. Thank you!

[@dysjectamembra5322]

Listen Doc, Thanks for these videos. Here's to you for doing this stuff, and being honest and clear about it.

[@PRADEEPCHANDRATHAPLIYAL]

Sir, with all due respect, you're doing a great job. You never fail to make me smile at how fascinating chemistry is. As an aspiring researcher in the field, I hope I see you in my feed more often❤

[@MohamedSaad-xj2ri]

I wanna you to dedicate video about reversable reaction, Actualy, I'm not a native English speaker, but I really enjoy learing with suck an amazing teacher like you, thank you so much

[@jonathanazenon8731]

Please a video on reversible reactions! Honestly this is my favorite channel to keep learning about topics we touched in undergrad. Keep up the amazing content

[@alexandervoytov4966]

Very good intro! I'd add more math to show Arrhenius law equation. I'm kind of a math person to go forward from an equation for: 1. Any complex multistage chem reaction could be easily described as a superposition of several reactions each of them has Arrhenius's nature and a cumulative Arrhenius equation can describe a multistage reaction ; 2. if a chem reaction has several physical stages, like liquid kerosene combustion, when kerosene is vaporizing first and chem reaction going on in gas phase only, such complex transition could be described by cumulative Arrhenius equation as well! Chemistry is easy with math!

[@ThreeTwentysix]

That is an excellent point and it's actually what happens with the rate equations (which is where we're headed with this series). That said, it's the activation energy of the rate determining step that makes the biggest difference since AE is an exponential term in the Arrhenius equation. But we'll talk about that in Transition States v. Intermediates, coming up.

[@Pedro.Navarro.25]

Of course we want one or more videos about reversible reactions and equilibrium, thank you for these videos.

[@siglec1]

I'm really grateful for your videos! Thanks for delving a bit deeper while still explaining topics so clearly. We'd love to see a video about reversible reactions.

[@ayaanchopra5755]

pls make a vid on an overview of chemistry and how to model and visualize certain basic things like kinetics,thermodynamicsetc. so that we can better understand when we read their application,like clearing misconceptions,thanks

[@raphaelhernandez7110]

top 10 chemsitry youtubers of all times!

[@ronaldmadureira3899]

Who are the others? I really would like to know.

[@BirdFinder]

Love all your videos. Very educational and all presented.

[@danahansen5427]

From the 'Timing is Everything' department, this appeared in my feed the same day (today) as a walk with my granddaughter to the coffee shop where (as is typical) a rabbit chase of topics occurred, in this case starting with dying weeds/weed killer, progressed through 2,4-D, then Agent Orange, to dioxins and why they were present, to reactions (with a momentary side trip to the accident in Italy in the 60s (date unsure), to reaction pathways (making 2,4-D endothermic, making dioxin from 2,4-D exothermic, causing the runaway reaction referred to above), then discussing the whole endo- & exothermic bit & reaction pathways when we got to the coffee shop. (With a side discussion about the difference between starch & cellulose for good measure.) I've forwarded your video to her to help her understand reaction pathways. Tl; Dr your talk on chemical reactions dovetailed with mine, the youngster benefitting. Thanks for the clear description and keep up the good work!

[@anekartrelaxationfilms6813]

A reaction with low activation energy will occur spontaneously, a reaction with high activation energy will need energy from external source such as electricity, sun etc. A substance with higher potential energy always has a higher activation energy and vice versa. Some exothermic reactions may not be spontaneous but when started will use the heat release to further the reaction. Endothermic reaction almost always need to be supplied with external energy to further their reactions.........U did well sir👍❤

[@jeremiahreilly9739]

Love love love your presentations. Thank you. More topics? Anything that interests you.

[@erikzachar4187]

I'll be so glad if you made a video about volatility or about topics like fluorescence, phosporoscence, non-binding interactionst

[@ThreeTwentysix]

Fluorescence, phosphorescence and chemiluminescence added to the list!

[@LiborTinka]

Thanks! You could also make a video about self-ionization (autoionozation) and homoassociation - I am struggling with understanding this and there is little information on encyclopedia. For example, the salt called sodium diacetate (the "salt & vinegar" flavor from Pringles) is a solid of two molecules of acetic acid and one (!) molecule of sodium. The "complex" is neutral because the two acid molecules share hydrogen atom. But how is that possible? I don't understand the dotted line - how can hydrogen be stuck between two molecules of acid like that? Another typical example is hydrogen fluoride and I think iodine does that, too (the triiodide ion). I think this topic can make your video interesting as you can show how the fluoroantimonic acid (the superacid) works, as it's one such "complex" - the dihydrogen fluoride cation and hexafluoroantimonate anion - it's not just hydrogen bonded to weak nucleophile as in normal acid, but this weird fluoride cation. Thanks for your videos, these are very informative and helful for self-learners like me - especially for revisiting the fundamentals.

[@muscovyducks]

good stuff. stoked about the transition state vid!

[@alansharples9520]

Great Video, when I was 12 I said to a physics teacher that the conservation of mass in chemical reactions was wrong , energy loss must mean a mass loss. He said go and ask the Chemistry teacher ! .I've only ever seen one mention of this in a Brian Cox film. I bet many chemists would say that mass loss was only happening in nuclear reactions. It is about time they updated on this. Keep up the great work

[@danahansen5427]

While correct, the change in mass for the energy loss/gain in most chemical reactions is typically not measurable with available equipment.

[@maximegorsse6627]

17:50 Yeessss please 🙏

[@lastchance8142]

Excellent discussion of the topic! Would love to see you produce a video describing the operation of enzyme catalysts

[@aleccoles5557]

This was really well explained, especially with the animations. Thanks

[@elijahl-s5184]

Yes, if you have time, a video on understanding the difference btw reversible and irreversible processes and a video on entropy would be greatly appreciated.

[@playgroundchooser]

I voted for the title, so I'd better watch the video right away. 😁

[@ThreeTwentysix]

I'm keeping track!

[@Cs13762]

These videos are so helpful for me. Thank you!!

[@noelbreitenbach8673]

Love your videos, like they’re always well put together bro

[@borispetrovchich3141]

Outstanding episode - thank you !!

[@triple_gem_shining]

Absolutely love your videos

[@mikesady3041]

Well thanks for everything I've learnt watching your video doc. Nicely done. Instant favourite, admire the way you're explaining it, big time . Also your sence of humour makes me feel in AAA part Big thanks and hugs

[@GoodWill-s8j]

M + F → MF is a very low activation energy reaction

[@avielaskira]

The worst encounter I had with low activation energy is with my previous boss. It took so little to make him burst with anger but it would take him hours to calm down.

[@EveK-North]

So, it's safe to say that activation energy is the same as bond breaking energy (bond disassociation energy)? When determining if a reaction is endothermic or exothermic, we compare the energy released in forming bonds in the product compared to the activation energy invested in breaking?

[@Archiekunst]

Great video. I recently saw a poscast between kate the chemist and neil degresse tyson, and according to your explanation they misexplained hydrohelic acid presuming it's simply a nuclear reaction and does not involve orbitals because they are empty. Which makes me think too, how does a proton occupy an empty electronic orbital?

[@ThreeTwentysix]

Ooh, very interesting, I'll have to track that one down. But very simply, chemists work with the concept of empty orbitals all the time, whereas physicists appear to treat orbitals as fundamentally being an aspect of the electron, so I'm not surprised that Neil deGrasse Tyson has a different point of view. From a chemistry point of view, however, the only peculiar thing here is that it's helium that's acting as a base.

[@multimeme5935]

Great Video, Reversible Reaction video please.

[@JoakimfromAnka]

I suggest a video about hygroscopicity. How can can compounds be hygroscopic _and_ soluble or reactive with water, and why is water the only liquid that can be absorbed?

[@fberron]

Super lecture! Thanks Suggestion: The famous Haber-Bosch Process and why we are 8 billion people

[@ShihabEl-dinAmir]

great and useful explanation professor , thank you

[@GeoffryGifari]

Hmmm how does activation energy work in terms of transition state and molecular potential energy for something like nitroglycerin? Is there no transition state/the electron orbitals are "stretched" enough already so an explosive reaction can occur through simple contact?

[@ThreeTwentysix]

The activation barrier is still there, it's just very low.

[@DemiImp]

Friction can include elastic deformation and isn't always from bond destruction

[@maxime3648]

Elastic deformation is bond destruction

[@DemiImp]

@@maxime3648 No, that's plastic deformation.

[@maxime3648]

@@DemiImp plastic deformation is bonds breaking up and forming back with other atoms, as opposed with elastic deformation where the bonds are streched but not broken

[@DemiImp]

@@maxime3648 ...... Yes. Exactly. Friction can be from elastic deformation between two surfaces. It doesn't require bond destruction.

[@maxime3648]

@@DemiImp i think i misread the first message sry

[@ruperterskin2117]

Right on. Thanks for sharing.

[@tamilbiology5078]

How enzymes lower the activation energy? Kindly explain

[@babynautilus]

when a substrate binds to a protein, the whole thing can undergo a conformation shift pushing molecules together in the orientation that is favorable for a reaction. the amino acids that make up the protein will also have certain side chains exposed in the active site, that influence the chemical and charge environment right where it needs to be!🤯

[@NotSure416]

A video on the mechanics of electrolysis would be awesome.

[@ostateczny_nurt]

do you have a book? i would buy that instantly

[@ThreeTwentysix]

Not yet. For the time being, this channel is my book!

[@youdontknowme6523]

Thanks professor ❤

[@BradleyLayton]

I would love to look at how to apply these concepts to pulling rare earth elements and critical elements from coal fly ash quantitatively. Thanks in advance for sharing technical resources.

[@ThreeTwentysix]

That would be a better topic for thermodynamics, where we look only at the beginning and the end. As for 'quantitatively' I would think that is unlikely to be an efficient process.

[@ahmadmunibhanifi3546]

Thanks alot very useful....can I ask you to make a video about Benzene Molecule and that's isomers...?

[@MCDainter]

Have you heard of the new glueball partical? Links to the furst ever formations of matter at the start of the universe. Love the video!

[@abu-karz]

So you're saying the emf or the source voltage of an electrical energy is the activation energy required to move the charges all throughout the complete circuit ? Sweet sense making logic!

[@mafrali2k]

Beautiful video!

[@seekingrafael5630]

I would love a video about statistical mechanics. Cheers!

[@ravindrarakate1621]

Hii.Are endothermic reaction more reversible compared to exothermic reactions ?? Since in exothermic activation energy is less for forward reaction compared to reverse reaction. And for endothermic the case is reverse.. so just asking ??

[@arbordianae]

i would enjoy an equilibrium video :)

[@foobarf8766]

Helium the first in stellar nucleosynthesis? It is H1 i thought (isotropic orbital)? More on orbitals and reversible reactions please! Kia ora from New Zealand!

[@mykeprior3436]

Why can I not untoast bread? Given enough energy assuming previous reaction products present in closed system

[@ThreeTwentysix]

That's entropy. And we'll get there in a future video.

[@nonamecukubik]

Man... I love you!

[@JamesVestal-dz5qm]

Lots of freshman enjoy experiencing the release of free energy as glass falls from the benchtop!

[@davecorry7723]

Very good ...

[@johnmosheim]

would activation energy be somewhat like chemical inertia?

[@atomicity.probably]

thanks!

[@mismail4965]

Dear Dr I am prof Ismail from pakistan.ur videos are quite informative.i would like to ask about examples of reactions with negative activation energy

[@dominictarrsailing]

activation energy of a friends wedding resulting in the reaction of getting a haircut if there are some molecules that have low activation energy to break apart and so much lower energy state after the reaction (such as non-mixture explosives) then how is it possible to produce the molecule in the first place?

[@ThreeTwentysix]

Well, you either have to be very careful or conduct the synthesis at low temperature. I think the latter case is more common in a laboratory.

[@dominictarrsailing]

@@ThreeTwentysix got it thanks!

[@notconnected3815]

Is it actually possible for a reaction to stop completely? Or does it just react verry verry slowly? Because by pure chance there will always be a few molecules reacting, even on low temperature, right?

[@ThreeTwentysix]

That's true. Generally, when people say something 'doesn't happen' we mean it's insignificant. But there are times when extreme purity is required where those processes become significant.

[@versus_x]

Electron spin video please 🙏

[@dibaldgyfm9933]

Cliff hanger. Dud you put a mattress under the table? It is such a cute little glass and I'd hate that you had to sweep all the glass splinters afterwards. And more: the bio electric activation energy to get muscles to make the arm move and push, that one is the answer to bonus section. ❤ At least that is what I thought you would say. ❤

[@netional5154]

It has always bothered me when I read explanations like 'an exothermic reaction releases heat'. Your explanations are filling in the gaps. It's the increased kinetic energy of the reactants, either directly by being attracted and exchanging potential for kinetic energy or indirectly by subsequently transferring this kinetic energy to other electrons/atoms/molecules by crashing into them.

[@ThreeTwentysix]

If you like this, make sure you're subscribed so you can catch the series on thermodynamics.

[@douglasfurtek7637]

Little did I know at the time that my "polishing" of the Angkor Wat Apsara would contribute so much to science.

[@ThreeTwentysix]

You must have been very busy!

[@stargirl1337]

Hey Any chance u could make a video on electrochem? BTW gr8 vids they rrly help with school.

[@ThreeTwentysix]

Electrochemistry will definitely come but it's a fair way down the list, I'm afraid. For now, I recommend that you do your best to understand reversible reactions. Once you understand how those works, electrochemistry is just reversible reactions done with a wire for the electrons to move one way and a salt bridge for the ions left behind, to move in the opposite way.

[@AmigoMurcho]

Good video

[@youdontknowme6523]

Can someone suggest me similar channels for organic chemistry, physics and biology?

[@kurz-Stibi]

20:10 Oh yes thos s also my favorite compound. 20:59 LOL a böack screen. So space is a broken mobile phone? 😉10:53 Thanks for explaining why the safety is indeed uaefull. Still anoying as it often gets or feels exagerated.

[@lautaromorales2903]

Excelent video. I can't wait for the N2 video! Is there a way to obtain the Activation Energy besides the K from the velocity law? (v=K[A]....)

[@ThreeTwentysix]

You can predict it with computer modelling, but experimental evidence is always king.

[@elijahl-s5184]

I love chemistry

[@ShivamSoni-uz5xw]

0:58

[@noway8233]

And i was looking " Baking Bad" and sudenly i got an interest in chemistry😅

[@maxihernan8978]

La explosión en Beirut 😮, por ejemplo

You asked me to click the like button, but I can't, as I already did it earlier! (This comment was left for the algorithm 😄)

[@Richardincancale]

Friction is chemical energy? Where would you put van der Waals forces (as beloved of geckos feet) - would you put that in a chemistry book or a physics book? :-)

[@ThreeTwentysix]

That's an excellent point. Personally, I'd categorise van her Waals forces as a chemical interaction, and therefore, a form of chemical potential energy but others might disagree.

[@deepdusto]

I love your thinking style (very few have that) but then you use some extra vocabulary like 'casual knocks', 'external knocks' and some more ... that I and many readers would not know ... so it becomes a bit of struggle to understand.

[@butterw55]

1:58 Disappointed you didn't use a cat to do this. This is the **internet**, for God's sake!

[@ThreeTwentysix]

Dammit, you're right!

[@chaoticrampage4160]

Around 10 yeas ago I provided 200 grams of black powder in a closed ball mill jar the activation energy to deflagrate by shaking it in my hands.

[@carly09et]

Three minutes in AND a question: how is 'Activation Energy' related to entropy? your examples were all entropic cliffs..

[@ThreeTwentysix]

In terms of the overall reaction, it's not related because the entropy of a reaction only depends on where you started and where you finished, not how you got there. But there is an 'activation entropy' which is a measure of how the entropy within the molecules changes to form the transition state.

[@Archiekunst]

I'd say the entropy is hidden in the difference between the initial and final states. That difference is actually the free energy of the reaction which is also expressed as enthalpy (heat of the reaction) - temperature × entropy. This is thermodynamics and tells if and how much something will happen but tells nothing of how long it will take. The activation energy is different and is kinetics, as in how fast something will happen.

[@Just_mind_______]

The minimum energy that a molecule must posses to react is activation energy. End of discussion 🙌

[@LucasVieira-ob6fx]

The (re)action that haves the highest activation energy is getting up in the morning

[@dcborgeson]

3:27-3:55 😁

[@sasokompa3337]

Do you wanna be my mentor? I learn more from you than my professors and books 👀

[@DuyNguyen-n7m8s]

Good🎉🎉

[@akarshpandey6135]

Bruh broke glass for us😊

[@ThreeTwentysix]

I'll let you in on a secret - the glass didn't break. I really like this glass, so I was crouched by the table, pushing it along with my right hand, while my left hand was under the table ready to catch it. All while trying to keep my head out of shot. This was not an easy shoot.

[@MadScientist267]

I figured there was a pillow on the floor lol

[@jelly-johnbobster2283]

This may solve the mystery of why the buttered side of the bread lands face down if dropped 😲

[@notconnected3815]

Choleric people also have a low activation energy 😉

[@ayoeditz4466]

Do more shorts bro

[@chenyongyan6664]

If friction is breaking bonds, why is heat released

[@lordchuthulu2426]

There is a certain species of chemical energy known as FLOOF that lowers activation barriers of any object near a table edge 😂

[@KOKAYI69]

Methane and H2 lower activation energy requirements!🎉

[@Grateful92]

The past is full of smoothed surfaces 😅

[@jareddkearns]

Eyring was ROBBED

[@RJHarvey272]

Heeeey! Another Eyring fan!

[@JeevanK-n5q]

Man whered your glass go did they lose their kinetic energy 😅😅

[@johnphillips2479]

Noble peace ✌️ prize😂 he ABYSS bound😮

[@mobileroto]

For F***'s Sake! stop pushing that poor glas🤣🤣🤣s!

[@ThreeTwentysix]

It had it coming!