A Level Physics Revision: All of Thermal Physics 2 - Ideal Gases
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- čas přidán 1. 07. 2024
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All of Thermal Physics Part 1: • A Level Physics Revisi...
All of my Revision videos: • A Level Physics Revisi...
Chapters:
00:00 Intro
00:25 Moles, Molar Mass, Finding the mass of a single particle
06:10 Assumptions of the Kinetic Theory of Gases
07:33 The Ideal Gas Law Equation
09:26 Boltzmann's constant
11:00 Boyle's Law
12:41 Pressure-Temperature Law
14:14 Boyle's Law Experiment
17:56 Pressure Temperature Experiment
19:40 Finding absolute zero experiment
21:40 Pressure in terms of the kinetic model
23:59 Root Mean Squared Speed
26:43 pV=1/3Nmc^2
28:00 Maxwell Boltzmann Distribution
32:13 Kinetic Energy of a single particle Ek=3/2kT
finally, I found the perfect material for studying physics! Missed a whole term for being sick and wasn't able to keep up in school which gave me much anxiety. This is such a lifesaver. Even better than the teaching in my highschool. Thanks a lot!
thank you so much! comments like these genuienly make my day. Glad this is useful, drop me a comment if something doesn't make sense!
How did it go?
You really saved me with the Ek=3/2kT derivation. I'm only a week from my paper 1 exam and I still didn't get it until i watched this
Glad to hear this was helpful! Good luck in exams
How did it go?
i didnt know u need to know derivations for ocr a ? do you?
@zion9146 b4o I'd u don't know that then all I can say sis good luck.
Yeah, how did it go?
Man you’re genuinely the goat
Geez 😭, your such a good life saver.i got exactly what I wanted in this video. 💯
Thanks a lot! Much appreciated!
You are literally saving my life!!! THANK YOU SO MUCH!!! 😭😭😭
Glad it was useful!
ZPhysics is the goat
This is so helpful! everything makes so much sense now
Glad to hear! Thanks for the comment!
thank you for these helpful summaries 👍
anytime! thanks for the comment!
Amazing explanation as always! Keep up the good work!
Thank you very much for the comment!
Have been preparing for State Olympiad. Your channel is one of those who is carrying me. Regardless of the result, I owe my knowledge of physics to people like you who share all of this through the platform I usse everyday.
Thank you so much for the comment, much appreciated and good luck on the Olympiad!
Thank you for this video, ideal gases is one of my least favourite topics and this video made it really easy to understand!
anytime! Thanks a lot for the comment!
for N, i thinsk its a good idea to mention that its number of molecules/ atoms rather than just particles because some markschemes dont allow particles for some reason.
Thank you sir, I’m speechless 👍👍👍
Thanks, glad this is useful!
The number of molecules per cubic meter of air at standard temperature and pressure is about 2.7 x 10 ^25 m^-3. What is the average separation of these molecules?
this guy is too underrated hands down the best online teacher when it comes to a level physics
thank you so much for the comment! Much appreciated!
Thank you!!! I’m preparing for BPhO and it really helps!
anytime! Good luck on the BPho!
hopefully i'm not too late but either good luck you'll smash it/you've definitely smashed it :)!
Excellent video as always. Just @35:35 you need to multiply both sides by 3/2.
thanks for spotting this, I'll include it in the description. And thanks for the kind comment!
if you are doing the aqa specification, on top of this great video, do go look at videos on charles's law as it is not included here
agreed, it's on my to do list : ) also - this derivation: czcams.com/video/J-8T1_8RZB4/video.htmlsi=YVKh2iJJ6boKQfSo
Amazing! thanks!
Anytime!
very helpful video! will you be uploading some past paper thermodynamics questions at some point?
Thanks a lot! Already have czcams.com/video/RpHeg1rrhuA/video.html but I will be uploading lots more. Stay tuned!
@@zhelyo_physics oh great i didn't see those cheers
Thank you so muchhh
Anytime! Glad it's helpful!
Bon Appetit
Hey ZPhysics, just wondering, did Charles's Law get left out accidentally from this video?
For the last question which equation did you use to figure out the mass? Because Mass = molar mass x (N/Na) but when we have 1 mole Na = N so its just 1?? I'm really confused.
That’s what I was thinking
Hi, do we need to know the definitions for Boyle's law, Charles' l, pressure temperature law for the exams? Thanks
Hi yes, we need to know the conditions for each, what is constant and the mathematical relationships between the variables. Hope this helps!
Hi, Have you convered Charles' Law in any other video? Thanks
Hi sorry, not specifically. Thanks for pointing it out I will add this to my list of videos to make!
Thank you so so much for this video. 😊
The two videos for thermal physics have been very useful for my revision.
I had a request, could you please provide a copy of the entire lesson, such as, a pdf file of the whiteboard with all the information?
I would love to have that and it would definitely come in handy,
thanks a lot for the comment! Sorry only the videos are available at the moment.
Very well explained, Can I get access to the notes ?
Thanks! Sorry only the videos are available.
Brother take screen shots
Very Very Very good video.
Glad this is useful!
24:00 rms speed
thank you sir
btw you missed the derivation of PV=1/3Nmc²
anytime! Are you doing OCR A? On this spec this derivation is not required.
Thank you for this video ! Is this for Aqa alevel phys?
it is for all exam boards, 99% of it is applicable to AQA always have the spec at hand and tick off topics of it : )
Do we need to know the graphs for these laws? Thanks
generally yes!
Is Charles Law included in Ideal gases?
depends on what specification/syllabus you are doing
isnt the pressure-temp law the one known as Charles Law?
nope, Charle's Law is that V/T=constant whenever , nR/p is at a const, so constant amount of substance and pressure.
Hello sir, me and my friend were debating what country you were from, during our procrastination from physics revision. he said Ireland and I said somewhere in Eastern Europe. Please let me know who won!
Haha, I am afraid you friend won, I am originally from Bulgaria however I have been teaching Physics in the UK for many years
Nice video
Thanks!
14:27
I love you!
What I love the most about your videos is that you stick to the syllabus, You're concise and you have absolutely great pacing. You're my lifesaver. Do you accept donations?
thank you so much for the comment! Much appreciated! Thank you very much for the offer but, rather a donation, just use this to invest in yourself, maybe a book or a course to help you in your future. Good luck!
At 37:40 why are u diving? Surely u would multiply by avagadros constant?
we are trying to find the mass of an individual particle rather than the number of particles. If the mass of one mole is 0.029 kg dividing by the number of particles (Avogadro's constant) will give us the mass of one particle. Hope this helps!
@@zhelyo_physics thank you that makes a lot of sense now
why is potenital energy assumed ti be 0 in a gass? each particle has KE doesnt it?
So similar to the gravitational potential, each particle has a negative PE and that increases with distance and once a gas it reaches 0. And yes, the particles are moving and hence have KE as well, average given by 1/2m*rms speed^2. Hope this helps!
sir is the pressure-temp law the same as charles law?
No actually, the pressure-temp law is Gay-Lussac's law that p/T = const. when the volume V=const whereas charles law is: V/T=constant when the pressure is unchanging. Hope this clears it up!
@@zhelyo_physics got it, thank you!
at 27:47, how did you equate mass to N*m, is it not equal to n*M??
Total mass = number of particles * mass of an individual particle, which is Nm
also, at 37:43, are you allowed to do that because you would rearrange N=n*Na to get n=N/Na and then substitute n into m=n*M?? and would that mean that N is 1, how would you know in this example that it is 1????
@@zhelyo_physics in my revision guide it says that total mass = number of moles * molar mass. How do I get from that equation to the equation you are stating?
@@oskarwitha_k8258 Hi! The equation I am stating can be easily understood if we think about it this way - if we have 5 particles, each with a mass say 1 kg, our total mass will be 5*1 = 5 kg. If we have N particles each with a mass, m, the total mass will be N*m, but in this case m is the mass of an individual particle.
In your revision guide they are taking m to be the total mass. Hope this helps!
some last minute revision why not
12:18 wouldnt a fixed amount of gas mean the volume is constant? Someone explain 😅
Sure, so a fixed amount of gas means the same number of gas molecules. You can still vary the volume. For instance if the same amount of gas goes from one container to the other.