GCSE Chemistry - Exothermic and Endothermic Reactions #43

In this video we cover :
- What exothermic and endothermic reactions are
- What reaction profiles are and how to draw them
- What activation energy is and how we show it on reaction profiles

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

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[@xml_rblx9576]

Sir I have a question, so if I put a cold water bottle out from the fridge and now it is gaining heat in order to balance its temperature with the room temperature so will it count as an endothermic reaction?

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[@nurdamiyahusna8938]

i love how you explain the activation energy, it's simple and very helpful to understand.thank you

[@Cognitoedu]

Glad you enjoyed it Nur! 👍

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His explaining is clear and his visualizes are appealing. Makes for great teaching.

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[@Cognitoedu]

Glad you liked it Mishael 😊

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Monica Ruben fortunately not, I’ve got my exams in June 2021

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[@Cognitoedu]

Thank you! 🤩

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[@Cognitoedu]

Thank you so much Aoife, glad you found it helpful 😊

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[@cynthiaoliver4469]

This has to be the best exothermic and endothermic reaction video out there!! Thank you sooo sooo much!!

[@Cognitoedu]

Thanks Cynthia, glad to hear you enjoyed it 👍

[@bashayerahmed6351]

thank u so much, it's clear

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Why isn't this auto-subtitled? No CC

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he made my life so much easier and this is GCSE chemistry, while we are taking this in g7🙁

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g7? do ya mean year 7?

[@blaire_bracheee]

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[@Cognitoedu]

🙌🙌

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Who else is here because they have an exam tomorrow 😭

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[@awaisahmed2827]

Th Anks

[@TrapHouseW]

Thank you

[@univ313]

Wait so is a chemical reaction in which the reactants have more energy than products exothermic or endothermic

[@avex3650]

Exothermic

[@kaleemkaleemksrh4080]

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[@diwanoorzai4950]

how do we know wether the products have high energy or not? so we can either place them low or high?

[@LG-tt2qz]

A good chemistry textbook should present a list of bond energies called enthalpies. Like a mass balance, you only have to count de bonds in a given compound adding theír respective enthalpies. And a simple enthalpy balance between the products and reactants of a given chemical reaction will let you know whether the reaction is exothermic or endothermic by a calculation known as the reaction enthalpy.

[@zaynsalah4255]

This is the same video

[@Cognitoedu]

Hi Zayn - it is! We're re-uploading this vid as we decided to make some small changes to timing of it as we felt it was a bit fast. Tomorrow will be a new upload though :)

[@qwertyalnoor87]

SAVER OF LIFE 😄😄

[@adesanyabukunmi]

Are the graphs if endothermic and exothermic in the video catalysed. I don't quite understand

[@literaryscribe_]

Same😢

[@uzmazubair1979]

Oh my GOD my final exam is in an hour I learnt the topics my teacher gave me but the test questions are sooo hard

[@wanhamdahwanahmad565]

Hi sir, I would like to know the software that you used tp produce the video? Thank you sir

[@prishax]

Thank you so much...chemistry has always been such a mess for me!!!!....one correction, at the end when you wrote chemicals on the graph for the endothermic reaction, you wrote CaO+O2 instead of CaO+ CO2. Thank you!

[@nabeelahmed4862]

Look at 2:52, he wrote CO2

[@prishax]

@@nabeelahmed4862 5:21 I'm talking about the energy level diagram.

[@sujaanish9290]

I understand nothing...

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😂

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😢😢

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when you have to watch science videos for online lessons 😭

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[@torrie9290]

Tbh your as good as my teach BUT your a good revision

[@MonnaMonkey320]

I can't get my head around the endothermic reaction because I would have thought that because it requires more energy to start the reaction the reactants would have a stronger bond (more energy) ?? plsss someone help

[@NezarIsmail-gv7xb]

Yes They have stronger bonds so they need more energy to break these bonds

[@elifgezer8763]

Helal olsun

[@tim7660]

His lisp when he says destroyed at 1:30 makes it impossible to not laugh

[@stuffing202]

4:43

[@sail4549]

I'm trying to wrap my head around this question, but why do the reactions between metals sulphate solutions considered as exothermic?

[@takachan2292]

I asked my teacher and when she reply me I will answer you

[@nawal8790]

because the bonds in the reaction are being formed, and this releases energy, hence considered exothermic lmao tell me if this helped

[@sail4549]

@@nawal8790 this really helped, thanks

[@nawal8790]

@@sail4549 anytime :)

[@Nazekosama]

i had fun actually but im not that type of person who likes chemistry often

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I HAVE SUBSCRIBEDDDDDDDDDD!!!!!!!!!!!!!!!!!!!!!!!!

[@pixelpro.123]

Warning ⚠️: "no energy was made or destroyed in this video"

[@iamsomeone8266]

you talk really fast, it would be much more helpful if their were captions

[@aimansyahmi6318]

you can change the playback speed if he talks too fast

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Life savar

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cool.

[@millielaycock]

if a reaction is endothermic surely it would get warmer as it is taking energy in

[@ramencat5151]

it is taking in energy making it's surrounding and itself colder.

[@Sasha-ct7os]

I know you wrote this a while ago, but it can be either. It just matters if it's taking in energy or not.

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hello

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Anybody here from teams lessons?

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Shrimplin

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I didn't understand

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i want my teacher to see this comment

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I never understand big words in chemistry smh

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Æ

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bruiv

[@a.le.x.12]

you got your calculations wrong mate 💀💀💀

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Ew I mean ey