give this man a prize. he saved me again this year, I wish more teacher would explain things so good as him.

I too, like to take my chemistry set to the beach.

@anotherdoseyt

6 жыл бұрын

Scienceizm why

@baylorjacob7792

3 жыл бұрын

You prolly dont care but if you guys are bored like me atm then you can stream pretty much all the latest movies and series on instaflixxer. I've been watching with my brother these days =)

@maximiliangage5288

3 жыл бұрын

@Baylor Jacob yup, I've been watching on InstaFlixxer for months myself :D

I got distracted by those perfectly straight lines you drew free handed. Very good video I love Khan academy!

@ComandaKronikk

8 жыл бұрын

+Brona Kennedy bro i'm really sorry but he was most likely using the straight line tool in paint.

Sherrie Wang I hope you watch this in the future and learn that "hey, maybe just feeding my students one example after another isnt working as every year all my students try to drop to go to the other instructor, this whole teaching the foundation thing that Kahn does is pretty useful"

Sal, im just wondering that you mentioned that internal energy is the combined sum of al kinetic and potential energy in a system. Considering Pressure and volume didnt change in the reaction above how was there a change in the U (internal energy) if the potential enervgy on the right hand equation got converted to kinetic energy? wouldnt the total internal energy (KE + PE) be the same?

Great video thank you

awesome!

This video have a ringing to it. Can the audio be fixed?

Thank you awesome

Hi, this is awesome! But is it possible if you could please reduce shaking the cursor so much? It's kinda distractive. I end up not paying attention sometimes. But you explain really well! :)

thank you!

You can convert C to K by adding 273 to the C. Just so you know, though, it doesn't matter if you use C or K for delta T. The difference is going to be the same.

Come teach at my school please!

If someone could pls help that would be awesome: Is heat of formation the change in enthalpy between the REACTANTS and products, or the ELEMENTS in the reactants and the products?

@666ILIKECAKE

8 жыл бұрын

It is reactants and products. Elemental reactants are used to get a relative idea of enthalpy and then extrapolated to other reactants theoretically by simple arithmetic.

@stoppyrs

8 жыл бұрын

666ILIKECAKE thanks! :)

Thank you

Does anybody know which program he is using ?

@ashfaqmur8584

4 жыл бұрын

Tumra ma ka boor program

How do you get the heat of the reaction in J when you took the measurements in C? I'm trying to do my lab report and I'm just LOST ):

@nsambamathias3727

Жыл бұрын

love it

Thank you for adding caption to this however; you are not allowing time for readers to read and see what you are doing. :) But still thank you for making caption..

ooooooh best teacher

4:32 dat axis lol =)

Perhaps, but I think it's more to do with the fact that it's not been given a very clear definition yet. Sal said it himself, he was just arbitrarily coming up with a definition (in the sense of a formula) for it (of course, he wasn't actually coming up with it then and there, but you see what I'm saying). So there's just not a very clear idea in my mind yet of what it means, in other words I haven't quite wrapped my brain around it, so it ends up sounding kind of meaningless sometimes.

at 8:22, how can -74 kj and +74 kj, both be exothermic reactions?

@NotDrak

6 жыл бұрын

Im not completely sure but i think he had a minor mistake there

Chemistry was bothering me for the longest time. There was just something about how it was being taught that felt very unintuitive. I knew there should be a better way to explain all these quantities (deltaH, Q, deltaU, W, P, V) without making a person insane. Thanks, again Sal :)

At 11:27 Salman could have meaned "So you'd have to say plus 249 KJ"

Can you replace my chem teacher?

Why does endothermic reaction(i;e we add heat to reactants and hence increase their energy) occur despite everything in universe wants to be in its lower energy state

@syedumamah5078

4 жыл бұрын

Plzz do answer me

ILY

Yea, I also bring my chemistry set to the beach

@anotherdoseyt

6 жыл бұрын

zaxneo I don't get it

carbon reacts with hydrogen to give "MATHANE" :v

What really messes me up here is that CH4 is used as a fuel and it's able to release more energy when converted to water and CO2. So that must mean CO2 and H2O have an even lower level of energy than solid carbon and H2. But I also thought that bigger molecules held more energy than smaller ones. Am I incorrect in this assumption?

Yeah, just "oneself" would've been good since she already started with "one".

My Chemistry teacher probably disliked this. Poor lady wishes she could've done a better job... so do I >.>

I should be able to give this 50 likes

This was back in the day where Wikipedia was still reliable

For me I really like corn What do you like about corn? Its corn! A big lump with knobs It has the juice (it has the juice) I can't imagine a more beautiful thing (Woo) It's corn!

Fucking awesome. Thank you.

why cant u b my teacher

how did you get 74 kj at the beggining

@WrathPhalanx

8 жыл бұрын

You get the standard heat of formation for methane from a chemistry textbook table or other source, and subtract the sum of the standard heats of formation for carbon and hydrogen in elemental form(which is 0 for both). The heat of formation of methane is about 74 kJ. Subtract 0 from this value and you have your answer.

@stoppyrs

8 жыл бұрын

+EZstrategies nice phat

you you will take your chemistry beakers on the beach😅😅😅😅😅😅😅!!!!!!!;

or himself...

my chemistry teacher needs to be fired.