Endothermic Reaction

[Brett121000]

~He broke 2 rules.....he didn't wear his glasses at all times and he didn't use both hands to mix the compounds~

[FlamingFox911]

Thanks for putting this on Youtube. I needed this for one of my high school assignments. Much appreciated.

[kevluv93]

so if delta H is pozitive you have an endothermic reaction?

[kevluv93]

@kevluv93 *positive

[datulD]

@kevluv93 yes

[shutyourmouth2]

I don't get it... melting a substance is an endothermic reaction, right? Because you put energy into it, it gets, hotter, and it melts. As it absorbs energy, it gets hotter. Ice is colder than water. So an endothermic reaction should feel hot to the touch. Or at least warm... unless it was really cold to begin with.

But this video seems to suggest that endothermic rxn's get colder, because it freezes to the block of ice. How can it freeze AND get hotter to the touch? I'm so confused.

[shutyourmouth2]

@shutyourmouth2 and by "block of ice", I mean block of wood with water on it. It was a slip of the mind, since the water (on the block) freezes and basically turns to ice...

[unambitious]

what is a mole?

[sgreen71778]

@unambitious It's a burrowing mammal.



[unambitious]

@sgreen71778 The other mole... but thanks anyway :P

[gabbygurloya]

my 11 year old sister is watching this =D

[hioeo]

So exothermic=fire

Endothermic=ice?

[MrDevil2000]

I don't get it!! :-(

If endothermic absorbs energy...isn't suppose to b entropy?

I'm really bad at chemistry...so can someone please help me.

[Randomator3000]

how long does the reaction last

[djdirtbag514]

@Randomator3000 Yeah how long until it reaches room temperature again. I'm wondering the same thing.

[MrNintoku]

I can use this for my Uni assignment. I'm becoming a highschool teacher btw

[freitasnetuno]

amazing reaction

[alfshead]

Heavenly98 - the ratio is approx. 1 gram of ammonium nitrate to every 2 grams of Barium hydroxide octahydrate. However if you could not work this out (simple mole calculate) you should not be playing around with these chemicals. Be safe.

[bigd1594]

hey i'm the 52,001 person to view this lolol.

[heavenly98]

Can you tell me the amount or ratio of barium hydroxide to ammonium nitrate?

pls. thx

[lukemc2]

wow i thought it would evaporate the water but it actually absorbed the heat and froze it

sweet

[AEROBubblez]

thanks i needed that!!!

[h1chaosss]

hey man, why did that happened??

[Aff01000001]

I would like to see a videou about superacids

[TehMG]

I wish my professors were that interesting. The ones I had were dull as hell. In the end I dropped out of university after completely losing interest.

[TAz69x]

I'll take a chemistry lecture room over a delusional church any day.

[DeltaPhi79]

TAz69x: So would I. The lecture is way more educational and helpful.

[Untruest]

Hey look what i found for those interested:

Ba(OH)2 • 8H2O(s) + 2NH4SCN(s) -> Ba(SCN)2(aq) + 10H2O(l) + 2NH3(g) ∆H = +170kJ

[Untruest]

Here's something else i found for those that might be interested:

Ba(OH)2 - 8H2O(s) + 2NH4SCN(s) -> Ba(SCN)2(aq) + 10H2O(l) + 2NH3(g) DeltaH = +170kJ

[bphendri]

Okay so your using Amonium Nitrate, couldn't you just add water to create the endothermic reaction? How Icepacks work.

And is the endothermic reaction actually being caused by the primary reaction or as a secondary reaction of the h2O being mixed with the remaining Amonium Nitrate?

(Since you state that Amonia and Water are being created.)

[Untruest]

if you look at the chemical equation, it takes 80.3 kJ to form the products. So it must absorb that heat (from the water in this example or surrounding) before the water is even formed.

Adding simply water to Ammonium Nitrate will definitely not have the same effects.

[rarejd]

Waters being released. But he's not only trying to show endothermic reactions, but also showing how rare it is for two solids to react with one another.

That's why he didn't just use the water.

[KevinR305]

your videos are great! helped me pass my exams bro.

[gordo783]

Good old Chem 1000

[peacefulterran]

just an idea: you put all your classes on YouTube. You create a private, on-line school, you make people pay a small fee to pass your exam so they can be credited for the course, and I can finally catch up on the chemistry I never learned :)

[Hashhakaj]

verey good I love Chemistry

[WatchGuy7]

I love chemistry

[bowmowbow]

That's my prof, the best prof ever. I wish all professors were the same....

[alysdexia]

5 stars, thanks!

[Estolcles]

I want to take his class. What college is this?

[dyscoefc]

wicked

[bludger247]

You guys are lucky to have such an awesome teacher

[raphskate]

what a funny teachers

[Rastaman12122020]

what a funny grammars

[edwebo]

lol nice one

[gabyxninjaa]

lmao