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

[@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...

[@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

[@jcricket_97]

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

[@aanchalsengupta]

Who wants to have a crying session?

[@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

[@Mark-in4sh]

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

[@drewsmith9]

this took cramming to another level

[@anniem8810]

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

[@B00Kitt3n]

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

[@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?

[@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.

[@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.

[@trezzuh]

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

[@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!

[@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

[@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

[@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

[@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.

[@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

[@levanoa]

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

[@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

[@whyman191]

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

[@930hockeywing]

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

[@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.

[@ceuceu9493]

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

[@melissahuguet2539]

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

[@Neonb88]

I laud you for speaking strictly. We wouldn't want to teach that the world is flat

[@DushyantDeshwal]

Only if Crash course Knew about 10 min mark .

[@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".

[@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 :)

[@adamlees1720]

Cattle-lists, I geddit

[@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.

[@malaikapatro7835]

This helped very much! Thanks crash course❤ From India

[@anyantadaroune6618]

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

[@lukeqin90]

Omg, I didn't even see that

[@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.

[@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.

[@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

[@technoplanet8858]

I see that many people have a problem with Reaction Rate Law.Rate Law links reaction rate with concentrations (or pressures) of reactants.A reaction can be written as ---- aA + bB ----> cC + dDThe coefficients(a, b, c and d above) of a balanced equation tell us in what ratio the substances react or are produced.The powers of '[A]' and '[B]' in the rate law expression i.e. 'n' and 'm' does not mean 'a' and 'b' i.e. the ratio in which reactants react rather the power is the relation between concentration of reactant and the rate of reaction. In the reaction at 5:12 , if the concentration of H2 is doubled than the rate of reaction(how fast reaction will occur) is doubled. If concentration of reaction is tripled than the rate of reaction is tripled.And if the concentration of NO is doubled the rate of reaction becomes 8 times. If the concentration of NO is tripled the rate of reaction becomes 27 times.So , in case of H2 the relation between concentration and rate of reaction gives 'm'='1'........[H2]^1.Similarly in case of NO the relation between concentration and rate of reaction gives 'n'='3'.........[NO]^3.Finally , we can say that order of reaction = n + m = 3+1 = 4. So this type of reaction is called fourth order.If in a reaction increasing the concentration (like doubling or tripling) does not increase the rate of reaction than the value of 'n or m' their is 0.Order of reaction is decided by the exponential powers of all the reactants.

[@technoplanet8858]

If anybody wants some help regarding Chemistry, Physics or Maths you can ask me on [e-mail] am happy to help.

[@lol-sg2km]

I cannot believe they came back and added chapter to a 9 year old video.

[@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!

[@IceMetalPunk]

When both exponents are 0, the concentration terms both become 1. This simplifies the rate equation to simply k, a constant. So no matter how much of each reactant you start with, the rate will always be the same. An example is the reaction H2 + Cl2 --> 2HCl (hydrogen gas + chlorine gas => hydrogen chloride gas).

[@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

[@JohnnyJohn12503]

Wish this went more in depth ;-; Is there an AP version?

[@TJBEATS97]

Lol AP

[@747station]

Bozeman Science is a youtube channel that has videos on AP chemistry. It goes into more detail.

[@JohnnyJohn12503]

Do you find it at all ironic that you spelled illiterates wrong?

[@kharjai5433]

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

[@Elle-rg1js]

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

[@csongorfeketehazi2105]

crash course is a blessing we do not deserve

[@brian7519]

Hank could be an auctioneer.

[@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"?

[@maireadks1509]

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

[@adityakhanna113]

4:28 Amount of "Hz"? It should be H2.

[@saeedbaig4249]

Ya I think ur right.

[@garrettludescher9588]

ya

[@zaiahsaranow8754]

Good catch.

[@roadgrime1972]

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

[@vascularviet]

"If you paid attention" I feel called out 😭

[@rnj117]

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

[@kleb3510]

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

[@bytebernie9399]

Out of curiosity Hank, do you have any degrees ? I'd assume that you have a degree in chemistry or some form of scientific degree with how well you can explain concepts :)

[@Kommandant7]

Haha, Sweet Tooth cameo. Somebody's been playing Twisted Metal.

[@InversePacman]

Kommandant7 I was wondering who else noticed that!

[@jimmysuros6302]

Kinetics, the bread and butter of chemical engineering.

[@TheDaspiffy]

Strictly speaking, catalysts don't lower activation energies, but provide additional pathways that have lower activation energies. Because the apparent (observed) activation energy

[@jendo6354]

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!

[@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.

[@TessaOswin]

why does the NO concentration power cube at 5:03 im so confused

[@SK-iv6kc]

Me too

[@TessaOswin]

+Squid Pham any idea where that number could come from

[@ScareSans]

+Squid Pham no, 2 means squared, 3 means cubed.

[@TessaOswin]

i know what is mean im wondering why

[@heptadd5559]

+greenmoneyfairy im wondering the same, pls help

[@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.

[@backgrrroundguy]

Ms. Frizzle beat Sweet Tooth from Twisted Metal 😂😂

[@assmane999]

+Background Hero Media Of course she did, she has a magic school bus. Seems like cheating really.

[@duketravers9706]

+Background Hero Media "It's time to take chances, make mistakes, shut up and bleed!"

[@queensaharaice7376]

+Duke Travers Lol 😅

[@chaotixthefox]

Magic School Bus is a win button in any Demo Derby since it can transform into anything you need. She could change it into a tank and wreck everybody.

[@vincentyang7415]

the bus still can easily take a car down

[@HelenMcNizzle]

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

[@incognitoman7436]

Nice video. Can anyone recommend me another best KZbin channels to learn Chemistry?

[@badkat5536]

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

[@marcelferreiro7800]

At 4:30, you said that to double the hydrogen you raise the exponent to the power of 1. However, raising anything to the power of 1 leaves it the same. Can you please explain this?

[@blundershelf]

Chem midterm tomorrow = CrashCourse tonight!

[@danheidel]

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

[@hlian1]

Catalysts, change the reaction mechanism; it does not lower the activation energy. The new reaction mechanism has a lower activation energy so it requires less energy, so it looks like activation energy has been lowered but you have not.

[@wynsumjokearns9783]

Ms. Frizzle as a demolition derby champion...... YES

[@USAFCAPN73]

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

[@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!

[@Frostypower]

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

[@MatthewRFiD]

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

[@sanchitagolder]

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

[@Froggeh92]

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

[@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.

[@MidnightRunner1337]

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

[@bladewind21]

I advocate for funnel cake chemistry to become that variable in computer programming when you can't think of a good name for your variable!

[@premgill2699]

7:00 Hank states that most reactions aren't in equiblirum because the reverse reaction's activition requires high activation. "Why? Because, remember, reactions take place in steps". What is the relationship between the high activation of the reverse reaction and reactions taking place in steps?

[@premgill2699]

Does this mean the forward reaction takes less energy than the reverse reactions, because it takes place in steps?

[@chaotixthefox]

Products usually have lower energy than reactants. Thus, to go back to being reactants they need more energy than it took to become the products.

[@MortRotu]

I dunno about the speed of light bit, but the extra energy just gets transferred to the product molecules as kinetic energy (for non-c speed reactions). so if the molecules have to hit at 10 mph to react, 1 is travelling straight at the other at 7 mph the other at 8, then the products would have enough energy to give 5mph between them (roughly, ask a maths person for the accurate answer) for motion.You'd have to ask a physicist (probably a theoretical kind) for the other bit.

[@AlexRlderRS]

Its amazing but i think Hank would be great to have making videos on physics as well.

[@almog788]

Crash Course Physics would be really neat.

[@kattessero87]

Anyone else curious what Hank's shirt says?

[@aaryanewasekar]

It says- eat five sheets of toilet paper while discussing the political situation in Nepal

[@DomSchu]

I like your history lessons the most.

[@nikithap8]

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

[@cbpsd]

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

[@AnimeArtista]

why is no one mentioning the many sexual jokes that can be made from this

[@DushyantDeshwal]

AnimeArtista Atoms are banging .

[@andre-xc6yz]

AnimeArtista Just how hard do they have to bang into each other?

[@jaynewton7458]

I'm quoting all those for a paper I'm doing for my chemistry class on kinetics

[@andre-xc6yz]

Jay Newton good luck :)

[@LuisSierra42]

atoms and molecules need to bang hard and good

[@harleyquinnwastaken]

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