Introduction to Enthalpy | A-level Chemistry | OCR, AQA, Edexcel

[@zacharyliu-walter4856]

When I was watching your video I realized you REALLY sound like Hermione Granger. I can’t be the only one thinking this right?

[@shanthajayasinghe7504]

Omfg yaaaaas

[@s1tiama293]

Their youtube videos are soo good why are they so underrated

[@AbdulBasit-ff6ig]

dats bcs of the society

[@starmix7382]

@@AbdulBasit-ff6ig PREACH!

[@movin3148]

Cause you have to pay for the rest of the video

[@pigeonlove]

Are they?

[@anugyasubedi3562]

In the last question shouldn't it be 173 - 9? Why did she take it as positive?

[@nicolasquintanaariste6614]

Thank you!!! I love how you are able to cover every point in detail and still make the video short while making it very easy to follow thorugh😃😃

[@oluomaonugha387]

Thank you so much I was really struggling with this concept

[@rahimeenzahid7909]

You teach way better than my chemistry teacher

[@abdirahmansuudi7522]

Thanks for your well prepared and summarized this helps us fruitfully

[@aishaabbasi1544]

when calculating the activation energy for that reverse reaction, why do you use only 9 and not -9, as it says in the question

[@eatinsomtin9984]

This is as its the reverse reaction sister, meaning that you would have to add the 9 as you are trying to see what the total energy was before the reaction took place.

[@cecile4738]

Great video, pack it up Hermione

[@jaredfranklin]

This was very useful, thank you.

[@itzclovise4617]

Thanks a lot it really helped me. Pls if u can explain Extractions of elements

[@Meekwinner]

Wanna be freescience guy

[@salmahassan7834]

you sound soo much like hormine granger

[@launchpadlearn]

Thank you! 😂

[@tomrobingray]

"The total enthalpy, H, of a system cannot be measured directly." - wikipedia "Enthalpy is then a precisely measurable state variable" - hyperphysics ?????

[@damnman5113]

Dancing Tom Enthalpy of the system cannot be measure directly, I think the enthalpy change can be measured directly but not Enthalpy of the system. That,s why we need born haber cycle to somewhat measure the enthalpy of the reaction.

[@obadashaheen9933]

Thank you 🙆‍♂️😍

[@azqaimran1571]

Do we have to do full book for our exams ? or some specific topics?

[@Maryam-kn3fx]

full book.. but you need to pay more attention on some specific topics

[@nadimsheikh]

fantastic video

[@isaacterrington1515]

This is helpful af during quarantine

[@lifelyrics5659]

Isn't enthalpy change of combustion burnt is excess O2?

[@MB-gk1ou]

Yeah it’s the same as saying it’s completely combusted- if it was burnt in not in excess of oxygen, then it would be partial combustion

[@umaisnaveed5527]

Very well explained! Thanks. By the way I love the accent✌️.

[@ramahrk]

I love this woman. She good💪😊

[@launchpadlearn]

Thanks! 😊

[@GLB20]

Does breaking bonds needs energy or releases energy?

[@sophiegeorge9601]

Breaking bonds needs energy, it is endothermic

[@ankitdoddamane391]

@@sophiegeorge9601 You can't call it endothermic, because exothermic and endothermic is a term for the overall reaction, not just a part of it

[@Meekwinner]

Energy taken in

[@zarakkhan1134]

@@sophiegeorge9601 energy is stored in the initial bonds or old bond of the reactant when we add energy the bond absorbs energy and as a result bonds get break....,,after bonds is brokenwhere does the initial energy and the thermal energy which we provided went ?????