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Boiling, Atmospheric Pressure, and Vapor Pressure 

Wayne Breslyn
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A video about the phenomenon of boiling for the Khan Academy talent search contest, July 2016.
Images:
Image of Earth from Space (1:12):
commons.wikimedia.org/wiki/At...
Layers of Atmosphere (1:21):
www.grc.nasa.gov/www/k-12/air...
Mount Everest (2:05):
commons.wikimedia.org/wiki/Fi...
This video is composed of three main sections:
- An Introduction to Boiling
- Atmospheric Pressure and Boiling
- Vapor Pressure and Boiling
By understanding the physical phenomenon of boiling other concepts, such as the effect of temperature on molecules, atmospheric pressure, vapor pressure, intermolecular forces, and temperature become more understandable.

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1 июл 2016

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Комментарии : 285   
@syedaairfan
@syedaairfan 2 года назад
No jargon, no BS intro; cuts straight to the point with clear animation/demonstration and simple explanation. We need more such videos! Many thanks to the creator!
@wbreslyn
@wbreslyn 2 года назад
You are most welcome!
@dovgewirtz1633
@dovgewirtz1633 4 года назад
The world needs more simple videos like this one !
@wbreslyn
@wbreslyn 4 года назад
Thanks! --- Dr. B
@Rohit9o
@Rohit9o 6 лет назад
The only video on youtube that explains this concept perfectly!!!!
@wbreslyn
@wbreslyn 6 лет назад
Thanks! --- Dr. B
@dipeshmalik6865
@dipeshmalik6865 2 года назад
Yeahh!!!
@OnerousEthic
@OnerousEthic 2 года назад
Not quite perfect in my mind. See top level reply under separate cover.
@muzammilsoomro6079
@muzammilsoomro6079 7 лет назад
By far the best explanation I've come across
@mrnaseem6507
@mrnaseem6507 7 лет назад
seriously! many many many thanks. You don't know how happy I am feeling after watching this video. It helped me solve my long pending answer. Had you been here...i would have kissed your hand sir. Thanks once again.
@Rakeshkumar30
@Rakeshkumar30 6 лет назад
Simply brilliant...this is the clarity every kids taking science should have
@ruthgoldblum919
@ruthgoldblum919 2 года назад
but WHY do the molecules act the way they do when heated? This video fails to explain that.
@karthikchowdary6649
@karthikchowdary6649 2 года назад
@@ruthgoldblum919 dude finish your 10th standard first,then u can research about pressure.
@Honey-hm7mp
@Honey-hm7mp 7 лет назад
that's what every student needs.easy and simple explanation .
@MrRavsta88
@MrRavsta88 2 года назад
Wow. Such a perfectly explained video without being overly complicated. I loved the use of analogies and real life demonstrations. That was perfect.
@yashvisaharan2597
@yashvisaharan2597 Год назад
this man's a legend! tomorrow's my exam and your video singlehandedly cleared my understanding of this topic and i have been struggling for weeks! Thank you so so much!
@ht-ve9fe
@ht-ve9fe 9 месяцев назад
I think my favourite part about learning concepts is that click moment where you didn't quite understand something and then suddenly it all falls into place.
@wbreslyn
@wbreslyn 9 месяцев назад
I agree 100%. It's sort of magical sometimes.
@decodingcap9965
@decodingcap9965 3 года назад
For a period of 6 minutes, I fell in love with physics. Nicely done explanation. Thanks,
@wbreslyn
@wbreslyn 3 года назад
That is great to hear!
@caseylocke4474
@caseylocke4474 6 лет назад
This is a GREAT video and showed exactly what I wanted to understand! Thank you so much for taking the time to create and share this! Just a minor suggestion, and this only because I'm coming from the point of view of someone who does voice overs. There is a good deal of mouth noise in the video which can be mitigated by setting your microphone to cardioid mode, dropping the gain a little from what it was, making sure your teeth are brushed and having a cup of a hot, clear liquid such as apple cider or hot tea. Just throwing my 2 cents in from my experience. Again, the video was awesome and I have not yet found a better one! MUCH appreciated!
@wbreslyn
@wbreslyn 6 лет назад
Thanks for the suggestions - recording quality is an area I would like to improve. I recently got a Yeti Blue mic and just checked to be sure it is on cardiod mode (it is). I believe I was using an older mic when I did the video. If you have a chance, see if this video is any better: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6b6GadB28o4.html . ---Dr. B
@donjet5371
@donjet5371 2 года назад
At 1:20 you say "only 50 kilometers has enough air for humans to breath." But 50 kilometers is approximately 31 miles; and 26,000 feet (8,000 meters or 4.9 miles) is the official ‘Death Zone’ where severe altitude sickness occurs without the use of supplemental oxygen. Other than this bit of confusion, the video is really good. The best explanation of boiling I've ever seen.
@wbreslyn
@wbreslyn 2 года назад
Hmmm. You make a good point!
@aliquis4460
@aliquis4460 5 лет назад
1:56 my chem teachers piling chemistry on top of me
@wbreslyn
@wbreslyn 5 лет назад
Yah, that's chemistry for you...
@Createbyhe11111
@Createbyhe11111 28 дней назад
Kudos to the creator for making this concept clear to me...
@sherazkhan2802
@sherazkhan2802 7 лет назад
Finally , I got what actually boiling is.... Thanks a lot ... I had a misconception .
@Sonu-ye5ux
@Sonu-ye5ux 3 года назад
This video is really helpful sir. Our teachers don't tell the concepts behind the facts but you have explained all things. I saw a lot of videos on RU-vid for vapour pressure and boiling but nobody explained so nicely like you. This 6 minute video really failed 1-2 hours lectures..... 😎😎 Thank u sir for making such helpful videos.
@wbreslyn
@wbreslyn 3 года назад
This is one of my best videos!
@youtubeweb3009
@youtubeweb3009 3 года назад
Absolutely the best explanation of this here in youtube .Thank you so much Dr.Breslyn!
@randomist1235
@randomist1235 11 месяцев назад
Amazing presentation! no crappy intro, music or anything, and the part of showing which topics are next. Thank you!
@TheChaosOfTheShadows
@TheChaosOfTheShadows 4 года назад
This video is fantastic! Thanks so much for it! I finally understand these concepts! You’re a lifesaver!
@rashmanidutta1379
@rashmanidutta1379 6 месяцев назад
Perfectly explained.I was having a doubt in this topics for a long time but you cleared it.Your explanation is brilliant
@clhe3375
@clhe3375 7 лет назад
Amazing video, loved it! Helped me understand vapour pressure in less than 10 mins.
@AbcDef-sb8tf
@AbcDef-sb8tf Год назад
I don't even have to rewatch many times to understand. This is the best Explanation ever. Thank You!
@wbreslyn
@wbreslyn Год назад
You are most welcome!
@user-wm9cv4fu6g
@user-wm9cv4fu6g 3 месяца назад
I am truly grateful to you. I never thought it would ever be so clear to me. Thank you very much.
@ajshowdown8033
@ajshowdown8033 6 месяцев назад
The most perfect video on youtube to understand boiling phenomenon and vapor pressure!
@europaepsilon7970
@europaepsilon7970 2 года назад
Hello Wayne Breslyn, before I tell you why I commented I want to tell you what I think the meaning of life is, the meaning of life is to know as much about the world around you so that you have the advantage over others to manipulate it (knowledge is power) At 2:05 when you explain why water powers at a lower temperature at higher altitudes I feel like I unlocked a piece of knowledge about the world. For me the whole reason I even care is because if I ever go camping high in the mountains with friends and I boil water I have the knowledge to explain why the water boils faster. I have the power to educate others because of you. Thank you. Some people take for granted that they live in the Information Age, in a time where you have access to learn about (almost) anything about our world and the universe.
@physiobob1
@physiobob1 7 лет назад
This is a really nice description of boiling and an important concept in human physiology and a great segway to understanding absolute and relative humidity... Have you ever thought of doing a video on those concepts?
@kaamidy
@kaamidy 2 года назад
before this i just know the definition of boiling but you changed the whole viewpoint superb sir
@chaktirose
@chaktirose 3 года назад
This was a well done video. Thank you for taking the time to make it!
@wbreslyn
@wbreslyn 3 года назад
Glad it was helpful!
@sonuchoudhary8600
@sonuchoudhary8600 3 года назад
Generally I don't comments on any kind of videos but after watching this video I can stop myself to do this ... perfect concept
@wbreslyn
@wbreslyn 3 года назад
Thanks, this is one of the best videos I've done to date!
@priyalbhardwaj696
@priyalbhardwaj696 Год назад
Finally something that was confusing me a lot is clear Thxx✨
@armaletalia3254
@armaletalia3254 Год назад
What an excellent video!
@AZLANAWAN_56
@AZLANAWAN_56 2 года назад
This channel is a miracle undoubtedly 💙
@wbreslyn
@wbreslyn 2 года назад
Thank you!
@alicewonderland9254
@alicewonderland9254 5 лет назад
This is a great explanation!
@wbreslyn
@wbreslyn 5 лет назад
Thanks, this is one of my best videos! --- Dr. B
@brennanmasaoybren2404
@brennanmasaoybren2404 Год назад
This is the most creative way to describe these things! thank you so much for this!
@wbreslyn
@wbreslyn Год назад
Thanks for the kind words!
@anmolgupta-bj5ce
@anmolgupta-bj5ce 2 года назад
Clear and conceptual explanation thank you sir 🙏🙏🙏🙏🔥🔥
@mni7928
@mni7928 4 года назад
Finally,find it. Absolutely great work. Thank you sir
@wbreslyn
@wbreslyn 4 года назад
Glad I could help!
@xcoffa9609
@xcoffa9609 6 лет назад
Thanks for the vid really elucidated everything
@wbreslyn
@wbreslyn 6 лет назад
No problem, elucidating is my thing. --- Dr. B
@kubramali4749
@kubramali4749 7 лет назад
thankx for an amazing explanation. ..amazing help for class lecture~
@alialkofee1
@alialkofee1 7 лет назад
Thanks a lot . this cleared some stuff up
@stharnlee9010
@stharnlee9010 3 года назад
Came here to try to understand the concept of Vapour pressure, nd I understood a lot more things than I was expecting, thanks so much.
@wbreslyn
@wbreslyn 3 года назад
Great to hear!
@curiouskiddo6885
@curiouskiddo6885 6 лет назад
Wonderful!
@khyatisharma3437
@khyatisharma3437 4 года назад
Wonderfully explained. Only Video on this topic with so much clarity. Seriously thankyou very much.
@wbreslyn
@wbreslyn 4 года назад
Thanks for the kind words! --- Dr. B
@Jordan_Dossou
@Jordan_Dossou 5 лет назад
Wow. Such a great simple explanation, but in depth too. Helps for AP chemistry. Forgot my honors chemistry
@wbreslyn
@wbreslyn 5 лет назад
Thanks and all the best in AP chem! --- Dr. B
@Bible_means
@Bible_means 2 года назад
No words.its most valuable teaching.
@wbreslyn
@wbreslyn 2 года назад
Thank you!
@trilus9199
@trilus9199 3 года назад
Thank you soooo much for giving us a clear explanation. It's really helpful to understand about boiling point and pressure more clearly.
@wbreslyn
@wbreslyn 3 года назад
My pleasure 😊
@shyamkiran397
@shyamkiran397 3 года назад
Finally a good one to understand this confusing concept🙌🙌
@wbreslyn
@wbreslyn 3 года назад
Thanks!
@haimz3854
@haimz3854 5 лет назад
Thank you very much!!! great explanation
@wbreslyn
@wbreslyn 5 лет назад
Thanks! --- Dr. B
@Rahul-oy1vo
@Rahul-oy1vo 4 года назад
Hello Sir , I wanted to ask when we have the vapour pressure above a liquid and also an external pressure acting on it(eg atm pressure) , What is the total pressure acting on the liquid at that time?
@johnjoshua7282
@johnjoshua7282 4 года назад
Beautifully explained
@wbreslyn
@wbreslyn 4 года назад
Thanks! --- Dr. B
@priyankabhargava7842
@priyankabhargava7842 Год назад
Thankyou. Lots of love and respect🙏😊
@aman7153
@aman7153 3 года назад
You are really amazing teacher sir. I am in class 12th (india) but didn't know the real Concept but the way in which u explain is outstanding. Hat's off to u sir
@wbreslyn
@wbreslyn 3 года назад
Glad I could help!
@arnauabfabf7400
@arnauabfabf7400 2 года назад
Excelent video. Thanks
@VARS-er8xc
@VARS-er8xc 3 года назад
best explanation ive come across on boiling point
@wbreslyn
@wbreslyn 3 года назад
This is one of my best videos!
@clairenime
@clairenime Год назад
I appreciate the video. Have a test tomorrow where I need to be able to explain this, but and this does a great job, I think my understanding on this topic got a lot better, I liked the visuals too.
@wbreslyn
@wbreslyn Год назад
Excellent and all the best on your test!
@anmolguptanm7515
@anmolguptanm7515 3 года назад
I m so curious to know what is boiling point, and I get the feel of boiling point. I appreciate your efforts
@toobahussain6492
@toobahussain6492 4 года назад
Thnku so much for this video ...it made my concept clear..
@yolanankaine6063
@yolanankaine6063 2 года назад
Very well explained
@amiraboodi2075
@amiraboodi2075 2 года назад
thank you very very much. this video helped me so much and answered my long-time questions. I'm a mechanical engineer.
@karmayuki9144
@karmayuki9144 5 месяцев назад
Thank you. This has cleared up my confusion😊
@dipendramaurya222
@dipendramaurya222 11 месяцев назад
Best n simple for understanding 😊
@upsidedown2240
@upsidedown2240 2 года назад
THANK YOU for explaining it completely! apparently some geniuses don't care to explain the effect of Atmospheric pressure on liquids, which made it frustrating to understand :/
@wbreslyn
@wbreslyn 2 года назад
Happy to help!
@karthikchowdary6649
@karthikchowdary6649 2 года назад
thanks a lot,everything explained that i had a doubt about.u earned a like.
@Rahul-oy1vo
@Rahul-oy1vo 4 года назад
I have a doubt hope you would help. When the vapour pressure and atmospheric pressure are equal boiling takes place, what is the total pressure acting on the liquid water at this condition?
@subashchandrabose3274
@subashchandrabose3274 7 лет назад
if water vapours are pushing against atmospheric air means they also push water down there, since pressure acts normally in all directions. How would this be correct explanation?
@madalixful
@madalixful 4 года назад
Amaaazing explanation, thanks a lot!!!
@wbreslyn
@wbreslyn 4 года назад
You are welcome!
@NainaTripathi-vh4ty
@NainaTripathi-vh4ty 7 месяцев назад
Ohh myyy goshhh!!! This video is a life saviour 😲😲😲😲😲
@eduardoquiroga6804
@eduardoquiroga6804 2 года назад
I was curious about that, it pretty cool.
@missionimpossible8961
@missionimpossible8961 4 года назад
Genius explanation
@wbreslyn
@wbreslyn 4 года назад
Glad it was helpful!
@SabrinaJ1063
@SabrinaJ1063 4 года назад
Nice, clear, pure water!
@wbreslyn
@wbreslyn 4 года назад
You got it! --- Dr. B
@kanchanthakur7428
@kanchanthakur7428 3 года назад
Thanks for such a nice explanation
@wbreslyn
@wbreslyn 3 года назад
Glad it was helpful!
@Rick_Pi
@Rick_Pi 10 месяцев назад
Great video ❤😊
@trishaseal7782
@trishaseal7782 3 года назад
Thank you so much sir, concepts fully cleared!
@wbreslyn
@wbreslyn 3 года назад
Excellent!
@VEAR31
@VEAR31 2 года назад
I have a Liquid Oxygen container at -196C, as per heat transfer I calculated a vaporization daily rate of 0.1036% at ATM pressure. if I increase the container pressure to 0.1519 kg/cm2 how much will the vaporization rate decrease?? How can I calculate this? I'm kind of lost, I was trying to use this ecuation but then I think probably is not the right one for my problem.
@NiharikaAChirayil
@NiharikaAChirayil 3 месяца назад
Thanks for the video it helped me out a lot!
@wbreslyn
@wbreslyn 3 месяца назад
Excellent!
@therealsan9949
@therealsan9949 2 года назад
he is best in this business!!
@janette9944
@janette9944 2 года назад
Love how he explains it simplefor kids to understand
@deeperloveforphysics9513
@deeperloveforphysics9513 2 года назад
Great video
@wbreslyn
@wbreslyn 2 года назад
Thanks! I thought you might find it useful.
@SyedaFareeha-mc9yw
@SyedaFareeha-mc9yw 3 месяца назад
Thanks alot Such a nice explanation
@wbreslyn
@wbreslyn 3 месяца назад
You are most welcome!
@sabinakoirala7268
@sabinakoirala7268 3 года назад
Sir does low atmospheric pressure decreases van Der wall force?
@muhammadishraqalishah4059
@muhammadishraqalishah4059 Год назад
Best explanation sir :) Thank You
@wbreslyn
@wbreslyn Год назад
You are most welcome!
@chonk_fox89
@chonk_fox89 3 года назад
Hi! Great video! I have a question about when the water 'boils' in the syringe, you said that was boiling with no increase in heat...is the boiling just the creation of the air bubbles and not heat? Or would heat have occurred eventually in the syringe?
@wbreslyn
@wbreslyn 3 года назад
The pulling on the syringe creates a vacuum. That makes it easier for water molecules to spread out and change into a gas. Some of that happens in the water - those are the bubbles. Heat won't be created by this process - the water actually gets colder. You can even use a vacuum to make ice (here's a goofy video someone did showing that happening: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2ugpooGzfR8.html).
@joshiifruit5554
@joshiifruit5554 Год назад
Thank you so much! So easy to digest and understand. Really appreciate it
@wbreslyn
@wbreslyn Год назад
You're very welcome!
@jodiekimbrough6671
@jodiekimbrough6671 4 года назад
Excellent!
@wbreslyn
@wbreslyn 4 года назад
Thank you! --- Dr. B
@pittaganesh3942
@pittaganesh3942 Год назад
No words guruji...I saw miracle...I saw a wonder....👏👏
@wbreslyn
@wbreslyn Год назад
Thanks for the kind words!
@sabinakoirala7268
@sabinakoirala7268 3 года назад
How does water vapour form? Please make video on this topic.
@rashmiyasora1523
@rashmiyasora1523 Год назад
Thank you 💜
@jahnavipunna7581
@jahnavipunna7581 Год назад
You have explained this sooooooooo well!!!!!!!!😮😮😮
@wbreslyn
@wbreslyn Год назад
Thanks for the kind words!
@aswinjomike9466
@aswinjomike9466 3 года назад
Awesome vid man.. U got yourself a subscriber!😍
@wbreslyn
@wbreslyn 3 года назад
Welcome aboard!
@pankajsarang1067
@pankajsarang1067 2 года назад
Nice video sir💥💥
@user-qu6oc2ej2x
@user-qu6oc2ej2x 4 месяца назад
does vapour pressure act only against the air molecules and not on the surface of liquid?
@helenchen6308
@helenchen6308 4 года назад
I feel there should be more said about what exactly it is and what causes it to go up and down.
@SHIVAKUMAR-qx4tm
@SHIVAKUMAR-qx4tm 5 лет назад
Tq ...👍.. U made it clear.
@wbreslyn
@wbreslyn 5 лет назад
Yw! --- Dr. B
@tocabenny2821
@tocabenny2821 3 года назад
Thanks about this information about boiling. It was so useful 😃😊👍🏻😄
@Singingplus2
@Singingplus2 Год назад
Wow brilliant 👏👏sir I under Crystal clear this topic
@gonartiste4515
@gonartiste4515 3 года назад
Thank you
@simpletonsimple1741
@simpletonsimple1741 3 года назад
adv chem anyone?
@georgiion1684
@georgiion1684 Год назад
best possible video thx
@wbreslyn
@wbreslyn Год назад
You're welcome!
@logicalparadox2897
@logicalparadox2897 9 месяцев назад
Correct me if I'm wrong, please ... But isn't water in its gas state called steam? Isn't water VAPOR what we call water that should be liquid but is in a gaseous state, like when it condenses into fog/clouds? I thought that steam is what is in the bubbles in boiling water and coming off the surfaces, but that the stuff we see is actually water vapor which happens when the steam slightly cools and starts condensing back to liquid drops suspended in the air. Am I just confused?
@harshitabheema607
@harshitabheema607 4 месяца назад
amazing
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