Endo & Exothermic Reactions - Energy Changes - GCSE Chemistry (old version)

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scienceshorts.net Energy profiles, enthalpy and bond energy calculations. ----------------------------------------
00:00 Exothermic & endothermic reaction profiles
04:03 Bond energies -
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Пікірлер: 33

@ahmedmujtaba6741 3 жыл бұрын

Thank you so much! so organized and so accurate information delivered in so little time! Very efficient and beneficial video thanks

@gauravresearch8 4 жыл бұрын

Amazing lecture. Great work

@qwyt_9778 3 жыл бұрын

Thank you so much for this!! Was so helpful :)

@Oh-lk2qd 4 жыл бұрын

Legend

@haz2022 Жыл бұрын

bro i fricking love u

@tinojr5163 5 жыл бұрын

Nice video

@tonnymuller6791 2 жыл бұрын

EXCELLENT

@amthalrasha1618 3 жыл бұрын

Thank u sooooooòooooo muchhhhh

@xanderconstantakis2276 3 жыл бұрын

the haber process next please

@arizonachannel6505 2 жыл бұрын

The part of the energy changes was my worst part of the topic____ thanks 👍 now imma good to go

@anniemations2495 3 жыл бұрын

Epic

@suxela360 4 жыл бұрын

Shouldn't there be an activation energy for endothermic reactions also?

@harunaissah7511 3 жыл бұрын

Is there an activation energy in endothermic reaction

@ScienceShorts 3 жыл бұрын

Yes.

@an5i910 2 жыл бұрын

when heat is put in, how does it get cold? Are you talking about the surroundings in this case or the reaction itself? because if its the reaction doesn't it get hotter since it "absorbs heat from the surrounding?

@marieanneschroeder4894 3 жыл бұрын

i thought the energy being made had to be negative

@0isab423 5 жыл бұрын

i have always thought that when the overall energy change is a negative number, the reaction is exothermic as the products have less energy than the reactants, although at the end your overall energy change was a positive number yet the reaction was exothermic? Please explain

@0isab423 5 жыл бұрын

actually no my bad i do understand the way you've done it, although to find the overall energy change you take the energy given out by making bonds form the energy required to make bonds :) but thank you great video!

@ScienceShorts 5 жыл бұрын

Yknow, I actually recorded myself explaining why it seems like the other way round, that being the potential energies are technically minus numbers. But trying to explain or understand things in those terms at GCSE isn't worth it. Good comment :)

@sibusisoj2070 2 жыл бұрын

How do you capture the video?

@nobodyknows.... 2 жыл бұрын

I love you

@ameliaroberts7348 2 жыл бұрын

Im confused for bond energies how did u get 412 and 360 I'm so confused ahah

@whitedragongaming123 4 жыл бұрын

Shouldn't it be hot when heat is put in??

@ooo_ikk1911 2 жыл бұрын

this is a very late reply but no. exothermic gives out heat energy so its hot cause of the heat being emitted. endothermic is taking in heat. energy so. absorbing it therefore it gets colder.

@whitedragongaming123 2 жыл бұрын

@@ooo_ikk1911 oh thanks for the clarification man

@Assassin_Saif 3 жыл бұрын

I am confused for the last one shouldn’t it be endothermic

@mathewm3073 3 жыл бұрын

Same

@sassy__diaryrose3067 Жыл бұрын

no, it's not. energy is being RELEASED. so instead of putting negative sign before the number (-1318 kg/mol, that is supposed to be exothermic), he wrote 1318 kg/mol RELEASED. That is literally the same thing, he didn't put minus before the number because how negative energy can be released?

@phildavies4814 3 жыл бұрын

Thanks for the good video, but I am confused. In the exothermic profile diagram, the BIGGER number is the "potential energy of reactants", the SMALLER number is the "potential energy of products", and the difference between them is the energy released as heat. But in the bond energy calculation, the BIGGER number is "energy released making the product bonds", the SMALLER number is "energy needed to break reactant bonds", and the difference between them is again the energy released as heat. So in the diagram, we're told the bigger number is a property of the reactants (their potential energy), but in the calculation, its a property of the products! (their bond energy). Please explain this to me, many thanks.