What Are Endothermic & Exothermic Reactions | Chemistry | FuseSchool
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- Опубліковано 6 лис 2016
- What Are Endothermic & Exothermic Reactions | Chemistry | FuseSchool
An exothermic reaction gives off energy to the surroundings; like a fire giving off heat. An endothermic reaction takes in energy from the surroundings; like a snowman melting.
Exothermic reactions transfer energy to the surroundings, and this energy is usually heat energy, they cause the surroundings to heat up. Just like a bonfire keeping everyone warm.
As well as combustion (burning), other examples of exothermic reactions are:
- Neutralisation reactions between acids and alkalis
- The reaction between water and calcium oxide
- Respiration.
It is easy to detect an exothermic reaction - just get your thermometer and see if the temperature increases. Most chemical reactions are exothermic, because heat is given out.
Physical processes can also be endothermic or exothermic. When something freezes, it goes from liquid to solid. Bonds need to be made for this to happen, and to make bonds you need to do some work, thus energy is given out and freezing is exothermic.
Similarly, when condensation happens - because a gas is going to liquid, again bonds need to be made and so energy is given out. So freezing and condensation are exothermic. Because in exothermic reactions, energy is given out to the surroundings. This means that the energy of the reactants is higher than the energy of the products.
Endothermic reactions are less common. They take in energy from the surroundings. The energy being transferred is usually heat. So in endothermic reactions, the surroundings usually get colder.
Some examples of endothermic reactions are:
- Electrolysis
- The reaction between sodium carbonate and ethanoic acid
- Photosynthesis.
Endothermic reactions can also be seen in physical processes. When something melts it goes from a solid to a liquid. For this to happen, bonds need to be broken. And to break bonds, energy needs to be put in. Boiling is also endothermic because energy needs to be put in to break the bonds for the liquid to turn to gas. Because in endothermic reactions, energy is added to the reaction, the energy of the products is higher than the energy of the reactants. And again, we can detect endothermic reactions with a thermometer because the temperature would get colder.
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Yet he explains something that takes teachers a WEEK to explain
well some of his explaining was wrong
omg ikr
no, it doesn't
Nicholas II so true
not even kidding my teacher spent 3 hours explaining and no one in my class got it
my brain has expanded to accomodate the knowledge and that means that i now have a BIG BRAIN. thank you so much .
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That pun could've been so much better
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Basically, exo gives out, endo takes in.
my brain does both
Saad Tab01 lol same
yep
blow me down
@@isabellabenson8034 What?
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⬇
mee
Me
mee
Yo paper
Me
I rememeber Endothermic and Exothermic by Enter (Endo) and Exit (Exo). I find it much easier.
I have a test tomorrow thanks :)
AranAnime same how was ypurs
welcome
Same
AranAni
same lol
What takes my teachers a week to explain
this video takes 4 min
Why r schools so complicated
Exp algebra i have a way of solving equations easy way
My teacher makes it harder
YES IKR
Me too
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These reactions has always been a lot confusing 🤦🏻♂️
*Exo -* gives out the E and makes the surrounding hotter .
*Ex-* Respiration , Bonfire
*Endo -* takes in the E and makes the surrounding colder .
*Ex-* Photosynthesis 👍
Nice! 👍
So...temperature increases in exothermic and temperature decreases in endothermic??? Am I right or wrong
@@P0P0_xyz288 your right
@@P0P0_xyz288 ya
@@P0P0_xyz288 to strengthen our concept, we should determine it is from system or surrounding.
Exothermic is condition where surrounding is heater and the system is colder. There is temperature gain in surrounding cause the system is disengage calor.
thx have exam won't stress now
Good luck!! We hope it goes well :-)
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me.
Tristan Carper me
me
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Hope it went well!
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Glad we could help you!!
Thank You for this. It definitely helped me with all the examples that you have. This video is highly appreciated😊
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So nice to hear! Hope it went well!
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Thank you! So kind of you!
Thank you so much for uploading this video, I have been struggling with chemistry for a while now and my teacher is terrible at teaching, so bad to the point I considered dropping out. This video was super helpful for me, thanks again for uploading - Sarah
Hi Sarah! So glad to hear that the video helped 🤗 And we hope you continue learning Chemistry. All the best ❤️
keep going! your helping me and many others!
Thank you!!
Thank you
Great explanation about these reactions. Thank you very much!!!!!
Glad you enjoyed!
Love your work!
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It is! Glad you liked the video!
whoah!! I'm relieved now, I understood everything
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3:33 all you need to know
Thanks bro that’s one question done
Someone make that guy my chem teacher
1:11 why would the temperature of the substance increase if heat is lost?
Because the sodium hydroxide is giving out heat to the water I think, but i am pretty sure that's what he meant.
SMHA Sharma because gay
i guess because the energy is released, makes the thermometer warmer thus making it give a high temperature
My teacher explained that the thermometer measures surroundings too, therefore it can get hotter
Simple example: reactants are 20°C + 20°C given to the surroundings that's how I understood it
Temperature of substance increases because heat is lost ( given out ) to the surroundings.
omg omggg thank you that was so helpful like i was confused and watching this made me totally understand
So glad!
HESSA ADEL same
explained better than my chemistry teacher
The graphs we learned at school for this were a bit different. The line connecting the reactants and products is slanted rather than curved like that.
my teacher made me watch this lol
Thank you so much for this greatly animated video. I actually have my final chem exam tom ;)
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So glad to hear that!
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Great to hear!
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Making bonds = Exothermic
Losing bonds = Endothermic because it needs more energy to break it
Lame man's words are good for understanding complex chemistry
thank you i had homework and this really helps
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Glad it helped!
what happens to the system during an exothermic reaction, my teacher said it becomes hotter but i don't understand that because the system in giving out heat so shouldn't it cool down?
Thank you soooooooooooo much for making this awesome video!!! It helps so much!:-))
this really helps.. thank you !!!!
So glad! You're welcome!
could someone explain the chemical reaction for freezing what are the products and reactants
Awesome
Thank you!
Thanks my teacher had to explain this is 2 weeks and I did not understand I watched this and it helped me a lot I have an exam thx!
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So glad to hear that!
If temperature goes down in endothermic reactions then why does the temperature increases while melting or boiling?
Thanks for the easy description. Had to smash the like button and OXIDISE the SUBSCRIBE button.
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Ludwig Van Beethoven do you go to bellaire?
thanks ,its really helpful. Watch this bcuz i didnt pay attention while having my online class.
No worries! Glad it as helpful!
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Now understood.Thx a lot
Happy to help!
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Like the video but your voice is so quiet! I had troubles listening even when the volume was full. Thanks for the video tho.
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0:51 Exothermic 2:13 Endothermic
*THANKS MAN*
Wow what a class
Great job! But there are NO new bonds (i.e. covalent or ionic) being formed in a change of state like melting and condensing. Intermolecular forces (i.e. hydrogen "bonds" or dipole forces) are being overcome or are becoming dominant in the tug of war between intermolecular forces and kinetic energy.
I found this video very interesting!!
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wow my teacher made this so much more complicated than it needed to be
Thank you sir....
Most welcome!
For the people complaining about teachers:
In our school we have sets, so we have different teachers for different classes,
some teachers might take a week on that subject because of the pace of the class.
So top set will move on quicker (big brain people) and bottom set will need more time to catch up (small brain people like me :D)
Idk if this helps but-
:)