demonstration of exothermic and endothermic reactions

exothermic reactions are the ones that release energy to the surroundings. during these kind of reactions the temperature increases and the container where the reaction is taking place becomes very hot. On the contrary, endothermic reactions have to absorb heat from the surroundings to start, during these kind of reactions the temperature decreases and the container where the reaction is taking place becomes very cold.
experiment 1: barium hydroxide + ammonium chloride
experiment 2: calcium carbonate + sulfuric acid

[@hughferrier5837]

This is super. I'm an old Chemistry teacher in the north of Scotland. Thank you for this demo for the COVID 19 lockdown. I will use it for my pupils.

[@ABC-ph5bq]

Scotland nice country

[@jefrin4338]

Ya

[@MoodyEhab-nc9ib]

Can you tell me how to study chemistry

[@shahznindas4065]

Thank u. The formation of ice proved the endothermic reaction so well

[@Ciborg1984]

Congratulations, excellent demonstration

[@PasseScience]

Hi, thx! May I use a part of this footage in another popular science youtube video? (with obviously a card, a link in the description and a footer on screen to reference this channel and video)

[@zackkingshort2663]

Good job 👍

[@komisariatnr3127]

For the second exothermic experiment, powdered aluminum can be added. The temperature achieved will be much higher 😁

[@aleciawiltshire9021]

It's amazing what science can do

[@faimazafar6323]

Wow thanks for telling

[@hggiken]

2 NH4Cl + Ba(OH)2 --->2NH3 + BaCl2 + 2H2O the first, I suppose gives NH3 in the lab with the extremelly smelling of ammonia. Nice experiment. Thats the only way (real time experiments) to have enthusiastics students, Tnx a lot.(from an Hellenic (Greek) high school.

[@halimdemir8522]

good job!!!

[@erzon1039]

thanks,
i would like to know how much time is it take to the solution (cooling experiment) to come back to room temperature?
and if i try to stir it again would it become cooling again?
or if i always stir would it stop fooling?
thanks a lot and waiting for your answers.

[@danielluzzio5111]

That first experiment was very cool

[@vajiullasagar8826]

Nice experiment mam 👏👏👏👏👏👏👏👏👏👏👏👏👏👏

[@roshanalexander2653]

What happens when you keep on mixing calcium carbonate and sulfuric acid

[@hugokeith4115]

Isn't the 1st demo an exothermic? because the temp continued to drop so the water must have released its heat?

[@AktaHasutan1948]

is the reaction permanent or it will stop after all the chemical bonds completely broken

[@user-yj1do3tc6p]

Nice

[@ericphantri96734]

Thanks so much. We done it in high school chemistry class but I was scare on large scale of uncontrollable side effect so I stop investigating

[@mohamedsahaldakat3409]

Thank you

[@Udot2]

Thanks

[@davidkrausse8954]

What are the chemicals being mixed here? I'm trying to use this video in my high school science class, but can't quite hear the names of the chemicals?

[@rafiatbm7867]

Barium Hydroxide and Ammonium Chloride...Initially the lump solids taken is Ba(OH)2 and afterwards the powdered solid poured onto the beaker placed on the wood in NH4Cl2..Hope you got your answer sir

[@madisongravel9030]

what was the temperature at the end of the first reaction?

[@beenapatel269]

22

[@amritasaini7149]

Suprb

[@ManojPandey-qp3gu]

Thanks mam

[@ayumi6120]

Thank youu

[@jumanaamdawadwala9185]

Thankyou

[@pushkartiwari5942]

Thanks 🌷🌷🌷🌷🌷

[@jokersucksatpoker1039]

Used this for school experiment

[@nusratparveen82]

Watching for online class

[@jimhenry1262]

Please give in grams or other units your formula by ratio please.

[@frownyy4501]

As a 6th grade student I actually learned alot!

[@david.jr.]

The 6th grade in your country must be really advanced.

[@frownyy4501]

@@david.jr. umm not rlly

[@david.jr.]

@@frownyy4501 in my former school 6th graders are just learning fractions and it's so bad that even the 8th graders don't know how to do fractions.

[@arabellapegarido9143]

What are the chemicals being used in the second experiment?

[@axatshah3036]

Calcium Carbonate and Concentrated Sulfuric Acid

[@curtissteenbruggen1491]

She literally says the names in the video lol.

[@Kyanix]

@@curtissteenbruggen1491 but someone wants to translate them because they don't know

[@curtissteenbruggen1491]

@@Kyanix they can’t translate what was said in the video?

[@fartwrangler]

Valium hydroxide??

[@ahmedosmanmustafa6338]

barium hydroxide

[@pushkartiwari5942]

🖊️🖊️🖊️🖊️🖊️

[@ABC-ph5bq]

I am here from india grade 10 ncert

[@nikan4now]

Can someone please answer my question? In the first endothermic reaction, the reactants absorb heat and the enthalpy of the products increase ie internal energy increases but why does temperature drop?!!!

[@coldbeans8923]

Nikan Rst am confused 2

[@axatshah3036]

Energy needed for the reaction is absorbed by the reactants from the surrounding environment. So, whatever temperature showed on measuring device is of surrounding not of material it self. And, that's why it shows lowering in temperature because, energy of surrounding is absorbed by reactants.
Whatever i write above is as per my understanding, Thank you

[@MegaFW]

The temp you measured is not from reaction but the surrounding, if reaction absorb heat then the heat of surrounding is decreased

[@amymelton3276]

The heat energy goes from the end of the probe into the solution. That makes the probe colder, and that shows as the temperature on the screen.

[@nikan4now]

@@amymelton3276 No but the probe and the products are in equilibrium (law of thermo) so the temperature of the products is lower too. But in endothermic reactions, the products are at a higher enthalpy. That makes me confused.

[@sahibzadamohsinsaleem4410]

this video was up to marks.
Miss how can we conclude the reaction in terms of energy from surroundings. More energy in reactant and product.
Please can you guide me.

[@zehrameer]

In an exothermic reaction, considering the reaction is a “system”, the energy flows from the system into the surroundings. In an endothermic reaction, the energy flows from the surrounding into the system.

[@sahibzadamohsinsaleem4410]

@@zehrameer Thank you miss

[@MireilleTannous]

for the endothermic reaction: the reactants have lower energy than their products. so they absorb energy from surroundings.
for the second exothermic reaction: the reactants have energy higher than their products and they release this energy while changing to products.

[@nabeelqureshi9640]

Tell me first reaction chemical.please

[@shitmypantstoday]

endothermic

[@pragatri]

Barium hydroxide in first beaker and ammonium chloride in second

[@ayumi6120]

Ok

[@ayumi6120]

Thanks very much

[@anwarelbarq466]

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[@newoperson2577]

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[@umerfilms]

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[@foad5339]

Persian? I am too

[@ginocarruitero3332]

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[@ahmadmokdad8010]

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[@broltok]

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[@christianrodriguez8378]

Someone give me the answers

[@ayumi6120]

^ ^

[@mojeebosmani533]

I think on your first expreiment that you did for freezing the water into ice is not endothermic. that is called exothermic because water releases head into its surrounding, its temperature lowers, so its freezing point and ice is formed

[@proudtoindian6024]

Mam can you come to my school because my school teacher is meetha 🙏🏻🙏🏻

[@newoperson2577]

who here is here from school

[@AlfLM2]

hello

[@ahmethayidov8605]

joe mama

[@pushkartiwari5942]

Thanks 🌷🌷🌷🌷🌷

[@kaarthikeyabeast5635]

Thanks