Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry #32

Have you ever been to a Demolition Derby? Then you have an idea of how molecular collisions happen. In this episode, Hank talks about collisions between molecules and atoms, activation energy, writing rate laws, equilibrium expressions, reactions mechanics, and rate-determining steps. And funnel cakes are AWESOME!
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
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Table of Contents
Collisions Between Molecules and Atoms 0:00
Activation Energy 1:32
Writing Rate Laws 3:28
Rate Laws and Equilibrium Expressions 5:30
Reaction Mechanisms 8:06
Rate-Determining Steps 7:04
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[@crashcourse]

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

[@Chilie5678]

good luck to everyone watching this the day before the test!

[@danyala.1659]

2019

[@chrisprilloisebola]

Thx bro

[@johnnyboy4101]

*Day of the test

[@ursamajor8051]

Thanks bro🙏🙏

[@karmareflhects7569]

🤝

[@orchdorkification]

Literally crying tears of joy. I have a HORRIBLE chemistry teacher, who does not teach us (he just goes through extremely complicated notes and uploads extensively long videos), but expects everyone to master the materials. Tomorrow is our test on Kinetics and Equilibrium and THANK GOD FOR CRASH COURSE (and Hank) BECAUSE IT HAS TAUGHT ME MORE IN

[@frompariswithhatred]

Shout-out to Ms. Frizzle for winning the demolition derby

[@sshknt5]

you won the comment section

[@elijahverbruggen5552]

She probably cheated. It's a magic school bus after all.

[@Finding-Infinity]

Man, if crash course didn't exist, I would not be passing my chemistry class.

[@chrysdeborah8933]

more like i would be passing out during chemistry class

[@allisonbyrne7791]

I would like to thank Crash Course and coffee for my education...

[@aanchalsengupta]

Who wants to have a crying session?

[@jcricket_97]

This literally helped me understand kinetics more than my 3 months chemistry course at MSU lol.

[@Mark-in4sh]

“It’s kinda intense, but we can handle it. Check it out.” Basically what I live by

[@thebluebeyond2329]

😂😂😂😂I missed that introduction sound. I haven’t watched a video for school from this channel in a long time. So happy to be back.

[@leahirwin_]

WHY DID I CHOOSE CHEMISTRY IM SO CONFUSED

[@wasiangie]

I love science. ; - ; * ^ *

[@justinskaggs96]

me 2

[@motasimfaiyaz2974]

How is 0.060 is half of 0.012?

[@machinemind1748]

0.0060*

[@raymondxiang7582]

@@wasiangie hi

[@ldrobbinsnest]

These videos are a great review for my chemistry tests. I'm taking my second chemistry class (for science majors) as a summer course, so we are going through this information rapidly. I had to take it in the summer so that I would be able to take my MCAT at the end of my junior year. These videos have help me review, realize, discover, and remember very often. Thank you Hank and everyone else over there at Crash Couse!

[@medjed2511]

Before I started learning chemistry I did a reaction with my friends where we put Lye into a bottle then add aluminum to it screw the cap on and it explodes we thought it was cool... but know I enjoy it even more because I actually know what's going on the aluminium acts as a catalyst and when you drop it in it produces hydrogen gas and steam pretty cool thank you Hank :D

[@drewsmith9]

this took cramming to another level

[@ray8k909]

Fun AND intellectual all while teaching us the basics of kinetics? WHAT IS THIS BLACK MAGIC?!

[@whitebread7953]

no majiks r involved, just some people who know what gets us

[@zaiahsaranow8754]

It is the wondrous magic of Hank Green. Also chemistry is f***ing awesome.

[@Kris-lu1rs]

Yes of course, can`t you see the dark mark?

[@Yellowboxable]

Who cares what grade you're in. Knowledge is knowledge, and grade (In this case) is just a number.

[@Spoo_oopS]

But if you're not old enough, you can't buy a bunch of bookcases and a Lamborghini to put in your garage.

[@B00Kitt3n]

This video just summed up my last 3 chem lectures in less than ten minutes and made more sense doing it.

[@trezzuh]

Hank Green.... ....Bless you.

[@pmz558]

dang if you play the video at half the speed Hank will sound as if he is totally drunk :)

[@Cursed1701]

+Ziyad Mohamed amazing

[@jodishapiro3575]

+Ziyad Mohamed That is brilliant! Much better way to watch the video my teacher assigned.

[@zemmym.9437]

+Ziyad Mohamed lollll tru!

[@danq456]

lol

[@aniqueahmed133]

Even the theme music sounds drunk

[@someirishkid9241]

How does he have the lung capacity for this?

[@kiwiflare]

dat sweet sweet editing

[@Ahmed-tz7fz]

who knows who cares, i don't

[@sunflower_boop4232]

He's mastered biology

[@nikoru347]

He summarized the whole chapter of my book in just 10 mins. Wow!

[@anniem8810]

This counts as studying for my chemistry exam next week, right? Thank you for explaining concepts in such simple and beautiful ways!

[@melissahuguet2539]

This is also relevant for college chemistry and I'm overwhelmingly thankful it exists! Thanks guys!

[@LaraSchilling]

I once watched this series for fun. I once again watched this series for fun. Probably a few more times to help understand certain things during my first university level chemistry class, did pass. Now I'm at the point of breaking down because the "orders" thing was explained by graphs and calculus. Hank Green saves the day, AGAIN.

[@Tabbz8645]

This dude is saving my life right now. My chem professor is so monotoned I fall asleep almost every day. I don't feel so afraid of my test tomorrow now.

[@930hockeywing]

@6:30 the lightbulb just came on! Thank you Green Bros. and Co.!

[@photonshermie]

I had to teach this earlier, collision analogies and all - the day after the news of Paul Walker's fate became widespread. It wasn't easy

[@HelenMcNizzle]

Thank you so much! This is DEFINITELY the crutch I need to survive Chemistry!

[@whyman191]

I have a test in AP Chem tomorrow! This helped me a lot! Thanks!

[@whitedove2596]

Hi Hank, I've been reading Six Easy Pieces by Feynman and he also states that atoms "bang into each other" but it is my understanding that it is an interaction of the forces between atoms which drives their movement and that nothing ever actually touches. I understand that the language of the quantum world is in some cases inherently equivocal, but I was hoping for clarification on this topic. Thank you, Andrew

[@1Poiuytgfdsa1]

this was the most sexual first 3 minutes of a crash course yet

[@daeviontaylor]

Hahaha genius..It got pretty gay at 2:15 though lol.

[@acedes8689]

I know right, "So if chemical reactions only work when particles band into each other good and hard" lololololololol

[@LuisSierra42]

i thought nobody noticed it

[@givememyname7919]

I thought I was the only one who noticed 😂

[@discordant8543]

1Poiuytgfdsa1 Um.. biology has like 5 videos about reproduction, including human reproduction

[@DushyantDeshwal]

Only if Crash course Knew about 10 min mark .

[@juniordouw6681]

LOVE the breaking bad reference / You are amazing for including it :)

[@yarriamapirate]

this is literally the only helpful resource i have found for kinetics. thank you!

[@aevaughn2]

I have a small bone to pick. The chemical reaction rate can be predicted by theory. There are variety of approaches out there, but Stephen Klippenstein and DG Truhlar of Argonne Nat'l Lab has written a variety of papers on the topic with various coauthors. See: The Journal of physical chemistry 100 (31), 12771-12800; Chemical reviews 106 (11), 4518-4584

[@levanoa]

I would have 0 in chemistry without Hank.... Thank you ! I love you and appreciate your work.

[@romantheflash]

I think this is the first episode I have understood without having to go back and watch it. I feel this is because I am finally understanding Chemistry, thanks guys :)

[@kharjai5433]

I read a chapter of an Analytical Chem textbook on Kinetics, yet this video was more informative. Well done.

[@nikithap8]

I love you Hank Green, I love you so much 😭 I have an AP Chem final this Monday and I am dyinggggggg

[@malaikapatro7835]

This helped very much! Thanks crash course❤ From India

[@adesoye908]

This video is perfect it gave me a great conceptual understanding of kinetic energy. The only thing I'm still unclear about afterwards is how to determine the exponential value of the reactants concentrations in the rate laws after performing the reactions experimentally and determining the rates of the reactions.

[@rnj117]

studying this at school right now ! i love it when crash course aligns with my school syllabus :)

[@roadgrime1972]

You are awesome as usual!! Thank you for the lesson. Love learning on KZbin.

[@VegasStreetLights]

Great way to prepare yourself for college level chemistry before the semester starts. CrashCourse, you guys really do need to add a Crash Course Physics section!

[@JoeDriver]

You make learning somewhat boring things very fun! Thank you for that! I also thank you for the little section center at the end of all of your videos! Thank You!

[@matthewcapobianco9332]

You saved my ass. This was the one thing that was killing my chem grade.

[@jkmass5789]

I love this guy so much his teachings are 😍😍😍 I wish their was cashcourse math

[@abar2486]

There is crash course statistics

[@Ezster69]

It helped me understand the collision theory better, but the formula part just went over my head. Only hw practice will help me understand that at this point.

[@adamlees1720]

Cattle-lists, I geddit

[@fightforfitness2256]

It is the best video on kinetics . Thank you Hank and the team.

[@vascularviet]

"If you paid attention" I feel called out 😭

[@VanTran-vu2lm]

I learned so much from this episode, thank you!

[@ceuceu9493]

the words used to describe kinetics have changed my view on chemical reactions forever.

[@Froggeh92]

This was a very good refreshment on my Rates of reactions and such. Thanks hank.

[@anyantadaroune6618]

Was the winner of the demolition derby a reference to "the magic school bus"?

[@lukeqin90]

Omg, I didn't even see that

[@cbpsd]

Yes Chemistry is exciting and I came to know it through your lectures only Mr. Hank. Thanks :)

[@Livinglifesince93]

Omg this helped me out so much. Thank you !

[@ianjamie7319]

At 8:09' in describing the role of a catalyst, the common expression "lowers the activation energy" is used. A better description is that a different mechanism is provided through the catalyst and the activation energy of that pathway is lower than that of the uncatalysed reaction.

[@harleyquinnwastaken]

Good stuff I have a test on this on Thursday, good revision! :3

[@vibhangaamarasinghe2397]

this is amazing. Thank you!!!

[@rorodango7784]

this is amazing.. thank you a lot

[@queergeologist8207]

Dang-it! Now I want funnel cakes!

[@lulublondy]

Me too! D=

[@coolcatho13]

lulublondy But why does he hope they sold funnel cakes in chemistry class? (I would understand why you would want a dessert in school, but why funnel cakes specifically?)

[@6.9minutes]

coolcatho13 Funnel cakes are sold at demolition derbies and he was comparing a demolition derby w/ chemistry class.

[@csongorfeketehazi2105]

crash course is a blessing we do not deserve

[@pcljet]

I'm looking forward to next week's segment on Solids, especially if it will cover the effects of surface area on reaction rate and other processes.

[@ianjamie7319]

Great lesson overall. A small problem at 3:45' when describing the form of the rate equation. It is explicitly stated that only the reactants are included. When looking at overall reactions (macroscopic scale) there is no a priori reason to exclude products or catalysts in the rate law. It is common to have only reactants, and in teaching we tend to stick with this paradigm, but it is not the law.. A rate law that has a product with a positive reaction order will be "self-catalysing".

[@sanchitagolder]

i see Our Heisenberg in 4:09 and appreciate it, thanks thought cafe!!

[@emeraldrodriguez6655]

THANK YOU FOR THESE VIDEOS OMG

[@hillaryho]

these videos are awesome!!

[@danheidel]

I'm shocked you went with funnel cake instead of fair corndogs, Hank! Also, nice Equilibirium reference.

[@maxigonzalez5235]

Well done! congrats to u all!

[@logangeorge3452]

Thank you for making chemistry easy for me to learn

[@Frostypower]

Why didn't I find this channel before? This is so good!

[@braedonvangorkom3308]

love that reference to the Magic school bus lol

[@MatthewRFiD]

Did Thought Cafe sneak Sweet Tooth into the derby? That was awesome!

[@MidnightRunner1337]

you have an amazing talent for teaching, i hope you have the success in life that you earn

[@Elle-rg1js]

just wanted to say crash course both chemistry and economics r real lifesavers.

[@harleyquinnwastaken]

A catalyst actually provides an alternative pathway for the reaction with a lower activation energy, thus more molecules and particles have an energy greater than or equal to the activation energy, speeding up the reaction.

[@brian7519]

Hank could be an auctioneer.

[@DushyantDeshwal]

It is still suggested to Read your text book . There are many equation stuff that were hard to explain in this short vid . After all this is just a crash course.

[@maireadks1509]

Morning tea and chemistry. I feel like I should write a song about watching crash course.

[@kavyaagrawal2013]

Amazing, as always! Thank you for these crash course videos, they really do help clear a lot of things up (and they're quite fun). P.S. at 4:19 I think there's a typo, shouldn't it be "Amount of H2" instead of "Hz"?

[@abrahampolanco4181]

For the people that are saying this is easy he is explaining the basic concepts so the student can understand and keep improving on there own, this is simple quick and easy thats why its called crash course

[@undertheradar4645]

How do you determine which step is the slowest? I had a question asking this on my hw and can't find anywhere that says how to figure it out

[@kleb3510]

could u do an episode about catalysts as most teachers try to fudge the explanation of how they specifically work?

[@bustead2]

48 hours later i will be taking a chemistry exam. Thanks to crash course for giving me a final tip!

[@DomSchu]

I like your history lessons the most.

[@tuseroni]

yes to funnel cakes in chemistry class!

[@ramsinitus]

awesome video!!

[@khaledalhourani813]

This is sick :D

[@hoosierhiver]

Demolition Derbys kick butt!

[@USAFCAPN73]

I feel like talking about catalysts in this episode would have been important and relevant

[@badkat5536]

If only they would sell funnel cakes before the AP chem exam i have tomorrow :(

[@juniordouw6681]

Cattle - List (Catalyst) xD . Love this video

[@larrysheklstien1010]

this helped alot

[@mangostar5]

YES KINETICS THANKYOU!

[@beatrizgusmao5212]

Best videos out there!!!!!

[@fleeb]

8:23 Cattle List... I found that visual pun amusing.

[@BlackMetalEnjoyer]

0:13 Lolz the smart car goes flying:)

[@Ballistik3]

I subscribed to this channel first, always running into the videos where John Green comes out in.. By mere coincidence and totally unrelated, I found scishow and Hank so I subscribed to that. You can imagine my surprise and shock when I learned they were brothers Lol

[@blinkx1070]

I like all these subtle references to shows like Magic School Bus in the Graphics