Endothermic reaction: very, VERY cool.

[@whistlegrasss]

"Can I touch the side?" "No."

[@1997xander]

XD

[@thatyoutubeguy2433]

2:35

[@sauceychris5283]

6 years ago I was 7 lol

[@ONE-vn9nl]

` Can I eat the side then?' ` Yes, of course!'

[@JackIsNotInTheBox]

For anyone wondering, they don't let you touch it because schools don't have insurance for student injuries, so they have to pay out of pocket if anything bad happens.

[@spiciestspeckofdust7844]

I love how you can just tell hes a good teacher

[@andrewwilliams3721]

he is very british

[@user-sb9xr4jk1n]

True

[@aitijhyasaha7858]

But not more British than Louis Tomlinson

[@DasMonke]

This what most British people sound like... And we can pronounce the letter t 😒

[@EmotionalSphere]

*bri'ish

[@navaehmartins1323]

0:23 "I was chopping up heart, so you know, need to..not..be covered in blood." Well, *that's* something you don't hear every day.

[@thomasking49]

HA

[@tenacious645]

Sounds like my ex wife

[@realeyes8199]

Kya bola?

[@descendedhalo5458]

Though the same thing lmao

[@Fillifjonkis]

I'm actually slightly surprised how excited the kids are. My thought is the reaction isn't very impressive but the teacher is so enthusiatic and engages the kids. Planning my own chemistry class this autumn and thought i'd adopt this stunt :P Any other ideas how to demonstrate the drastic temperature drop?

[@jacobhinchliffe6237]

About the most excitement you'll get in Scholl to be honest.

[@nodraw_]

I know that I may be late, but how did it go?

[@rineeshparai1780]

Well I was very impressed!

[@Tyler-z8r]

Honestly it is a pretty cool reaction (no pun intended). Most reactions give off heat, it's honestly rare for reactions to be endothermic (I don't know how true that actually is because exothermic reactions are probably just done more because they're more interesting to watch)

[@molecule_thebean]

Who else has to watch this for Science online class?

[@huntert0x1cz56]

me

[@samvandenbroeck8092]

me too :(

[@TheUnfriendlyScav]

@@samvandenbroeck8092 yea

[@TheUnfriendlyScav]

@Lucy Dasher lol I'm done with the class now good luck!

[@xazperentertainment3311]

just found this because I am doing a research report ABCD criterion summative

[@tenacious645]

This makes me want to be a chemistry teacher. Those kids' reactions are every bit amazing as the chemical one in my opinion. I love that "ohhhh!" moment in people. Being the one to inspire that seems so rewarding.

[@nykolelynn]

GUYS THIS IS THE WRONG PERSON FROMTIKTOK

[@kuziva4122]

Yh

[@7ayarina]

I cant find it!! 😫

[@albertalways4059]

@@7ayarina same

[@juaneduardoverach.7435]

WHATS THE LINK FOR THE REAL ONE PLS TELL ME

[@Vanessa-cl9mw]

LMFAO I CANT FIND IT

[@richbenson2431]

"One of the products of this reaction is ammonia, which I forgot about"

[@maskedmarvyl4774]

"I was chopping up hearts earlier, and I wanted not.....to be covered in blood". I hope he was kidding......

[@Tyler-z8r]

chicken hearts I'm sure

[@VeryFairygirl14]

I inadvertently requested a lecture on endothermic reactions from my bf when we were talking about homemade ice cream. I had no idea what he was talking about so here I am.

[@JustinKoenigSilica]

our teacher did this, he lifted 8 school books with it

[@albertomoreno7101]

my youtube recommendations at 3am

[@alph-lj3uy]

This isn’t the right video from the tiktok lmao

[@sriramuluk2615]

It's nice to learn more about endothermic and exothermic reactions

[@gloobark]

I love his absolute disregard for lab procedure especially around kids lmao this guy is a real as hell i wish he was my teacher

[@pigeon.paloma]

@@gloobark hes my teacher :p

[@abelcastaneda3036]

Does anyone know where to buy the chemicals

[@myasworld9538]

Who’s teacher is making them watch this 😃👍🏻

[@molecule_thebean]

Yup. You know it.

[@oldfashionedwrx3574]

one of my favourite reactions :) it is really cool because a lot of people get that wow factor from seeing something go all cold and freeze!

[@yeahx32p69]

1:54 ITS A TRAP

[@kato_08_m]

I noticed the pun🤣🤣🤣Brilliant

[@kudakwashetshado3781]

i never heard anything all i heard was waffling

[@Bai_Su_Zhen]

Does it matter whether we use octahydrate baryum hydroxide or just baryum hydroxide?

[@pfrances09]

omg! i tried this on school Thank u very much for this experiment ,Although unfortunately i failed on freezing with the block of wood :( I used 10 grams of Ammonium chloride and 32g Barium Hydroxide... Omy.. IT SMELLS AWFUL.. please wear your surgical mask..[i didn'nt wear one ,i only have a surgical gloves] (not a pair) Lol it was fun, it took me 4 mins, for stirring the mixture :D

[@SirValiantIII]

what an incredible teacher! SO engaging

[@MariamGabr]

If its abosrbing the heat why the temperature doesn't get warmer?

[@kingpotato4771]

Well you see, the compound absorbed the heat during the reaction leaving an absence of it in its place

[@codymireles]

+Mariamita Gabr Heat and Temperature are two very different things. Heat is the energy that transfers due to a difference in temperature while temperature itself is simply the measure of how much energy something has (kinetics) Too many people confused Heat for Hot.

[@mocatube1289]

I agree with your question, I think the same way all the time, I think its just that the energy absorbed is being used to break the bond and the energy given out (for the bond making, bond making is exothermic) is not enough to cover the energy taken in therefore the temperature decreases.

[@asudhiarta]

I think its an exothermic reaction instead, which is not absorbing , but releasing the heat from system to environment. Thus it become cold.

[@abayamangali]

Today is the 10th anniversary of this video

[@pushkartiwari5942]

Thanks 🌷🌷🌷🌷🌷

[@elvenlie]

Only watched this because of the title, not disappointed

[@kylemoore1305]

Your here from TikTok?

[@MAD-nx3er]

Yes 😐

[@hanna-be8ld]

wait is this even teh vid lmfsoo

[@jibjabbinjabberjaw5564]

@@hanna-be8ld no

[@albertalways4059]

@Christina Han drop the link

[@laudibetha.franciscop.3rob711]

Yeaaa

[@ragheebaashfaq9205]

Can someone explain how a cold pack is endothermic in simple terms and like where does the heat go ? Since it’s endothermic

[@seanacademy1437]

The energy is stored in the chemical bonds of the new substances created in the chemical reaction.

[@srkgalaxy824]

He does not have gloves on at all times which is a rule in the "lab rule'

[@possiblyannoyingvids]

There's a science teacher at my school called mr bell how strange

[@cafi1999217]

Does anyone know of other products with which you can do this

[@blakejohns3408]

water and ammonium chloride, H20 and NH4Cl

[@SivaSankarBalanSSSB]

Thanks for the experiment. Give me a tip, Can I make it as a solution and use it in a heat exchanger for drawing heat out of water.

[@tookiecookiewookie]

Quality banter on show there in that title, Mower would be proud.

[@leewilliam3417]

Great 😊

[@TheHotmud]

If you added an acid to it, it would completely mess things up. Hydroxides are bases, meaning it would form barium chloride and water. Which is fine and dandy considering that this is a displacement reaction to make BaCl2 and ammonia gas but acid/base reaction would be exothermic.

[@ck1416]

this video is very good, thank you for it

[@nickmad887]

Thanks

[@Yellow_927]

He’s so nice

[@thatguyted6739]

Ha, I love how people are asking why he has hand sanitiser. Man I miss those days...

[@bobinsouled5363]

Can confirm this was very, VERY cool

[@theecleopatraa]

It _might_ be below 0° but it’s definitely below 32°

[@QueSaraSara4]

I like your glasses @ Mr Bell

[@user-uo3wn2lr3o]

he sounds like he knows what he’s doing

[@alkeryn1700]

great teacher.

[@user8482.]

epic 😹😹🤣🤣😍💀💀🏴🇦🇷🏴🇦🇷🇦🇷🇦🇿🇦🇹🇧🇼🇨🇦🇨🇫🇧🇫🇨🇫🇨🇦🇨🇫🇹🇩🇨🇴iuiuyijvjv

[@vladimirnachev324]

how does that work ?!?!

[@nikan4now]

Could you answer my question? If the reaction is absorbing heat and the enthalpy ie internal energy increasing, how come the products are at a way lower temeprature?

[@jonathananderson6631]

Energy has different forms. Heat (Temperature) is only one specific form of energy. In this example, the reaction is absorbing Heat Energy and turning it into Chemical Energy which is stored in the bonds of the newly formed chemical inside the beaker.

[@lil_weasel219]

@@jonathananderson6631 nice comment

[@ahmedegymed5853]

@@jonathananderson6631 Nice,thanks.

[@BarryPiper]

I have Ba(OH)2 but it's not hydrated. The coolness (ha!) of the reaction was just barely noticeable when touching the side of the beaker. Would I be able to kick up the cold by simply adding some water at the time of mixing?

[@BecauseWeCanTheChannel]

Does this work for other hydroxides as well (i.e. strontium hydroxide, calcium hydroxide, etc)?

[@aishahnadhirah5949]

I'm thinking of doing this for my science fair project.. I have a few questions and I hope that somebody can reply back to me as soon as possible. 1. What substances work well together like the ones in this experiment besides ammonium chloride and barium hyroxide? 2. Where can I get them or at least where can I usually get barium hyroxide and ammonium chloride? 3. What is the chemical reaction for this experiment? 4. What are the uses of endothermic reactions, if there are any? 5. How can I present the data (what is the data anyway)? 6. Do you think that this is too simple for a ninth grader?

[@aishahnadhirah5949]

7. The amount of energy used for making and breaking each bond

[@mocatube1289]

This won't be too simple if you describe the reason under why the energy is being absorbed (exothermic and endothermic, bond making and bond breaking) etc. You can graph the temperature absorbed and look online at the bond energy within kj/mol of the bond (Ex. NH4, 4 N-H bond, thats ....kj/mol). Endothermic reactions are used in everyday life like ice melting ( energy must be absorbed in order to break the solid bond) .

[@Liongaming-iq7ym]

Anyone one else watching this for school 😂

[@bobfreuden]

Chemical ice nucleation for weather modification. Boom!

[@justinmiles1082]

Why doesn't the water in the beaker freeze

[@fredericsmythe1764]

justin miles The water in the beaker doesn’t freeze because the mixture of water and ammonia chloride has a far lower freezing point than plain water

[@domesticd3signer339]

Who else checked to see if the video was playing 1.5x speed?

[@louiesutton9747]

davied???

[@memetube5555]

Chemistry for life

[@tinyspeaker]

Sounds better than my chemistry teacher.

[@rosesoverdoses5159]

love the video proffesor

[@martaysiakkharrisj3900]

what kind of brands is this

[@domesticd3signer339]

Nile red got curly hair!?

[@Megabob-u5y]

I thought this was Mr poweel

[@Annakpk22]

Keep going teacher!

[@zachpanda3]

that was cool not disapointed by title

[@aquacode2]

Does it need to be barium hydroxide octahydrate?

[@ZacharyNanners]

As a Nuclear engineering major right now I am trying to make complete sense of this... is it safe to say that in general the reaction as a WHOLE is endothermic, in other words OVERALL more energy is needed in the breaking of the bonds(bonds of the initial reactants that is) than is released in forming the products once it is all said in done? Essentially energy released when forming the products is significantly less than what is needed/absorbed to break the bonds of the reactants. The energy that is needed to break the bonds is taken from the environment(liquid water on the block) which ends up being greater. The energy taken from the water on the block is enough to cause the Intermolecular forces in the water to overtake that of the chemical energy in the water after the reaction goes to completion, causing the water to solidify and freeze the block and beaker together. I wrote this out for those trying to understand, I am aware I may not be completely correct, but that is my interpretation as of right now with my knowledge.

[@reedgarrett2453]

+ZacharyNanners Yes, the reaction itself is endothermic, because the breaking of bonds and reformation of them is the reaction itself, thus where the energy from the water is being drawn to. hope that helps

[@fuckdyoud2734]

the jargon of enthalpy, entropy, and gibbs free energy will help you understand this in a more mathematical and perhaps easier format.

[@tanmaybhonsale4221]

can the reaction take place in a solution of ba(oh)2 and nh4no3?

[@pfrances09]

does this need hydrochloric acid .. or ammonium chloride and Barium hydroxide only? Also how many grams did you put on each?

[@danielluzzio5111]

Very cool. 😂

[@Izukumidoriya-zq3vf]

1:29 he coughed

[@ct6502c]

I'm just starting to get interested in chemistry, and I'm fascinated with endothermic reactions. But are the chemicals in this experiment dangerous? I mean, other than the ammonia vapors, is there anything hazardous about it? I really want to try this. The reaction seems to be very mild. You could make your own home made refrigerator with this :)

[@reedgarrett2453]

+ct92404 You don't need to just use these, barium nitrate may be hard to find. All you have to do is find the ammonium chloride, then dissolve it in water. The dissolution of ammonium chloride if quite endothermic as well. It isn't as endothermic but it still gets quite cold.

[@boneless-yeet-1127]

definitely superglue

[@adrianien6047]

very, VERY not cool

[@alexgabriel9711]

Is anyone else here for online school?

[@Sans22776]

PUNtastic title

[@MrBellScience]

@elvenlie Ta! :)

[@kickstar1776]

I don’t get why this is endothermic

[@idigmusic4405]

takin in that energy

[@libby8139]

The ending 😂

[@izakara_arakazi]

FORBIDDEN MILK

[@Ananyaisnotstable]

I read the channel name as MrBell end xd

[@klong3455]

How did you dispose of the waste products after this experiment?

[@shibaplays]

burn it

[@stevencorrea6946]

Spray it into the atmosphere

[@jaddus_]

so is this a chemical or a physical reaction...

[@smoothcriminal5650]

chemical

[@lluviagarcia6124]

If its absorbing the heat from its surroundings, shouldn't the temperature be warmer? This is so difficult to understand!

[@rovshangasimov5939]

yes it's absorbing heat from surroundings, however,it uses this energy to break off the bonds and create new bonds that's why temperature decreases

[@lluviagarcia6124]

+Roshqa Qaqash Thanks so much. 😅

[@rovshangasimov5939]

You are welcome, where are you from?

[@maulikaka9493]

lluvia garcia h

[@sarahwilliams1865]

Yeah i was thinking the same thing

[@roza7723]

Nice

[@yaboikyles2859]

My teacher told me to watch this She also left a different link to the "answers" *it was rick roll*

[@jameswhite3060]

It's not a pun, it's a play on words. :)

[@asudhiarta]

Isn't it an "exothermic" reaction instead ?

[@verma_jay]

No, in exotherminc heat is released.

[@Gengibrecookie]

super cool hahaha

[@slateflash]

Cool, i see what you did there

[@Yellow_927]

King

[@ethanboy9295]

MGS BOYS WUA

[@jessicastallard9007]

what chemistry concepts are demonstrated in this video?

[@MrBellScience]

@tookiecookiewookie Mower would be sarcastic, as usual...

[@Ham549]

I remember the teacher doing this in high school chemistry. after the demonstration he started writing on the board and I noticed a kid behind me was sleeping. I also noticed the décor the teacher had did the experiment in was left unattended still producing ammonia. Two guesses what I did next >:D

[@Ham549]

Beaker not decor

[@LGBTNetwork2]

what?

[@trivialtrav]

I'm guessing you did absolutely nothing and then decided to make up a story about it you could write online.

[@embmanders6514]

POG

[@sciencewithsayar3292]

nice video #sciencewithsayar

[@user8482.]

❤️❤️❤️😍😍😍😍😍😍😍😍😍😍 lengggg

[@mahfoozali8474]

Lol