Boiling, Atmospheric Pressure, and Vapor Pressure

[@syedaairfan]

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]

You are most welcome!

[@Rohit9o]

The only video on youtube that explains this concept perfectly!!!!

[@wbreslyn]

Thanks! --- Dr. B

[@dipeshmalik6865]

Yeahh!!!

[@OnerousEthic]

Not quite perfect in my mind. See top level reply under separate cover.

[@dovgewirtz1633]

The world needs more simple videos like this one !

[@wbreslyn]

Thanks! --- Dr. B

[@mrnaseem6507]

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.

[@muzammilsoomro6079]

By far the best explanation I've come across

[@Rakeshkumar30]

Simply brilliant...this is the clarity every kids taking science should have

[@ruthgoldblum919]

but WHY do the molecules act the way they do when heated? This video fails to explain that.

[@karthikchowdary6649]

@@ruthgoldblum919 dude finish your 10th standard first,then u can research about pressure.

[@MrRavsta88]

Wow. Such a perfectly explained video without being overly complicated. I loved the use of analogies and real life demonstrations. That was perfect.

[@Honey-hm7mp]

that's what every student needs.easy and simple explanation .

[@yashvisaharan2597]

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!

[@decodingcap9965]

For a period of 6 minutes, I fell in love with physics. Nicely done explanation. Thanks,

[@wbreslyn]

That is great to hear!

[@ht-ve9fe]

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]

I agree 100%. It's sort of magical sometimes.

[@AbcDef-sb8tf]

I don't even have to rewatch many times to understand. This is the best Explanation ever. Thank You!

[@wbreslyn]

You are most welcome!

[@youtubeweb3009]

Absolutely the best explanation of this here in youtube .Thank you so much Dr.Breslyn!

[@caseylocke4474]

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]

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: kzbin.info/www/bejne/bJOZeJSad5drpZY . ---Dr. B

[@aliquis4460]

1:56 my chem teachers piling chemistry on top of me

[@wbreslyn]

Yah, that's chemistry for you...

[@randomist1235]

Amazing presentation! no crappy intro, music or anything, and the part of showing which topics are next. Thank you!

[@sherazkhan2802]

Finally , I got what actually boiling is.... Thanks a lot ... I had a misconception .

[@donjet5371]

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]

Hmmm. You make a good point!

[@rashmanidutta1379]

Perfectly explained.I was having a doubt in this topics for a long time but you cleared it.Your explanation is brilliant

[@ajshowdown8033]

The most perfect video on youtube to understand boiling phenomenon and vapor pressure!

[@Sonu-ye5ux]

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 KZbin 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]

This is one of my best videos!

[@I_Knew_Edits]

**Video Summary**: As heat is added to water, water molecules gain energy and move faster, eventually forming a gas known as water vapor. This vapor is what constitutes the bubbles seen during boiling. The process starts with water molecules, where oxygen (red) and hydrogen (white) atoms combine. As heat is applied, water molecules move faster and can spread out, forming water vapor. The black areas represent empty space. Boiling involves the formation of bubbles due to the spreading out of water molecules in the form of water vapor. This spreading pushes surrounding molecules away and results in bubble formation, causing the bubbles to rise to the surface. Atmospheric pressure significantly impacts boiling. Earth's atmosphere creates pressure; the lower we go in the atmosphere, the more air molecules exist, leading to higher pressure. However, as we move higher in the atmosphere, fewer air molecules result in lower pressure. Atmospheric pressure arises from the mass of air above us, which gravity holds close to Earth. This downward pressure due to gravity prevents the atmosphere from drifting into space. Atmospheric pressure affects boiling. When we ascend a mountain, the decreased air pressure allows water to boil at a lower temperature than at sea level. Pressure variation impacts the behavior of water molecules and their ability to form bubbles. Boiling is determined by the interaction of atmospheric pressure and the vapor pressure of water molecules. Vapor pressure arises as water molecules escape the liquid and collide with air molecules. The atmospheric pressure pushes down on the liquid, making it difficult for bubbles to form. When vapor pressure increases, it counters some of this pressure, making it easier for water molecules to form bubbles. This balance between vapor pressure and atmospheric pressure defines the boiling point. Boiling can be induced by increasing vapor pressure or reducing atmospheric pressure. Once these pressures are equal, the boiling point is reached. Different substances have distinct vapor pressures due to varying molecular attractions in the liquid state. Stronger attractions result in lower vapor pressure, leading to higher boiling points.

[@wbreslyn]

Thank you!

[@I_Knew_Edits]

@@wbreslyn You're welcome, Sir.

[@priyalbhardwaj696]

Finally something that was confusing me a lot is clear Thxx✨

[@sonuchoudhary8600]

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]

Thanks, this is one of the best videos I've done to date!

[@Createbyhe11111]

Kudos to the creator for making this concept clear to me...

[@europaepsilon7970]

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.

[@Ramvati-o7l]

I am truly grateful to you. I never thought it would ever be so clear to me. Thank you very much.

[@clhe3375]

Amazing video, loved it! Helped me understand vapour pressure in less than 10 mins.

[@khyatisharma3437]

Wonderfully explained. Only Video on this topic with so much clarity. Seriously thankyou very much.

[@wbreslyn]

Thanks for the kind words! --- Dr. B

[@AZLANAWAN_56]

This channel is a miracle undoubtedly 💙

[@wbreslyn]

Thank you!

[@TheChaosOfTheShadows]

This video is fantastic! Thanks so much for it! I finally understand these concepts! You’re a lifesaver!

[@nahnerb]

This is the most creative way to describe these things! thank you so much for this!

[@wbreslyn]

Thanks for the kind words!

[@aman7153]

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]

Glad I could help!

[@stharnlee9010]

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]

Great to hear!

[@Kaamidy]

before this i just know the definition of boiling but you changed the whole viewpoint superb sir

[@physiobob1]

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?

[@chaktirose]

This was a well done video. Thank you for taking the time to make it!

[@wbreslyn]

Glad it was helpful!

[@khadizatulkubra2750]

Very clear presentation. Really appreciable

[@armaletalia3254]

What an excellent video!

[@shyamkiran397]

Finally a good one to understand this confusing concept🙌🙌

[@wbreslyn]

Thanks!

[@trilus9199]

Thank you soooo much for giving us a clear explanation. It's really helpful to understand about boiling point and pressure more clearly.

[@wbreslyn]

My pleasure 😊

[@VARS-er8xc]

best explanation ive come across on boiling point

[@wbreslyn]

This is one of my best videos!

[@anmolgupta-bj5ce]

Clear and conceptual explanation thank you sir 🙏🙏🙏🙏🔥🔥

[@nword9239]

I was a book nerd in U, but revisiting the concepts is nice.

[@sabinakoirala7268]

How does water vapour form? Please make video on this topic.

[@toobahussain6492]

Thnku so much for this video ...it made my concept clear..

[@Leo3T]

Super useful for my HVAC class that I’m taking. Thank you!

[@wbreslyn]

That is great to hear! HVAC involves some serious science. Heat pumps alone contain a full course in thermodynamics.

[@nur96369]

Finally,find it. Absolutely great work. Thank you sir

[@wbreslyn]

Glad I could help!

[@clairenime]

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]

Excellent and all the best on your test!

[@janette9944]

Love how he explains it simplefor kids to understand

[@subashchandrabose3274]

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?

[@alicewonderland9254]

This is a great explanation!

[@wbreslyn]

Thanks, this is one of my best videos! --- Dr. B

[@SyedaFareeha-mc9yw]

Thanks alot Such a nice explanation

[@wbreslyn]

You are most welcome!

[@surajdhadse4301]

I did't get at 1:51, the more above u the more pressure. I mean how pressure is more at high altitude away from gravity, isn't it ?

[@dariopl8664]

There's more pressure at less altitude 'cause there are more air molecules above you. So, the more mass overhead you the more the pressure is exerted to an area (in this case water surface).

[@amiraboodi2075]

thank you very very much. this video helped me so much and answered my long-time questions. I'm a mechanical engineer.

[@priyankabhargava7842]

Thankyou. Lots of love and respect🙏😊

[@upsidedown2240]

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]

Happy to help!

[@karthikchowdary6649]

thanks a lot,everything explained that i had a doubt about.u earned a like.

[@helenchen6308]

I feel there should be more said about what exactly it is and what causes it to go up and down.

[@logicalparadox2897]

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?

[@redraprs8828]

easy to understand in molecular level

[@wbreslyn]

Excellent!

[@NainaTripathi-vh4ty]

Ohh myyy goshhh!!! This video is a life saviour 😲😲😲😲😲

[@demardemar5848]

This is GOLD!!

[@pittaganesh3942]

No words guruji...I saw miracle...I saw a wonder....👏👏

[@wbreslyn]

Thanks for the kind words!

[@dipendramaurya222]

Best n simple for understanding 😊

[@xcoffa9609]

Thanks for the vid really elucidated everything

[@wbreslyn]

No problem, elucidating is my thing. --- Dr. B

[@karmayuki9144]

Thank you. This has cleared up my confusion😊

[@johnjoshua7282]

Beautifully explained

[@wbreslyn]

Thanks! --- Dr. B

[@kinglau7260]

Thank you so much, sir. I was wondering how bubbles are formed and what boiling is, and what's inside of the bubbles. You solve all my questions. Some folks say that the bubbles are made of some gases like CO2 that are dissolved in the water, when it gets heater, the gases will be forced out of the water, and release up into the air. Most of people believe except me, because I know it's not possible that water can absorb that amount much of gases and keeps releasing them out. And that's why I'm here, searching for the answers, and finally find out that they were wrong, all wrong. The bubbles are actually water vapor, which means they're still water just changed their forms. Thank you again for teaching me a new lesson! Hope your channel be more popular and keep teaching others. We have enough fools now.

[@wbreslyn]

Many people also believe the bubbles from boiling are H2 and O2 because water is splitting apart. Most think the bubbles are air. We even have additional evidence because we can condense the steam from boiling water back to regular water. You should be proud that you reasoned out the correct answer, that the bubbles are water vapor! Sounds to me like you have the potential to be a great scientist. --- Dr. B.

[@kinglau7260]

I'm hoping to work with you someday! Dr. B. I've been always having strong desire to become a scientist ever since I was only a child. There are just so many mysteries in this word that are waiting to be discovered.

[@kinglau7260]

And I really do have great interest in chemistry. Do you mind telling me some secrets learning chemistry well?

[@wbreslyn]

At the core is the interest - that's what drives you. But you need to find people who have a similar passion, and ability, and work with them to learn at a deep level. Finally, as you grow, teaching others can be a powerful way to learn. It is for me. One last thing - don't just rely on books and the internet. Try to solve real problems and think outside just information. For example, how would you chemically test the vapor from boiling to prove it was water? All the best, Dr. B

[@kinglau7260]

I think to prove that vapor is water, the key is to cool down the water vapor, decreasing the molecules' energy will make the water molecules come back closer together again, making it back to liquid.

[@SabrinaJ1063]

Nice, clear, pure water!

[@wbreslyn]

You got it! --- Dr. B

[@jahnavipunna7581]

You have explained this sooooooooo well!!!!!!!!😮😮😮

[@wbreslyn]

Thanks for the kind words!

[@joshiifruit5554]

Thank you so much! So easy to digest and understand. Really appreciate it

[@wbreslyn]

You're very welcome!

[@sabinakoirala7268]

Sir does low atmospheric pressure decreases van Der wall force?

[@therealsan9949]

he is best in this business!!

[@haimz3854]

Thank you very much!!! great explanation

[@wbreslyn]

Thanks! --- Dr. B

[@arnauabfabf7400]

Excelent video. Thanks

[@Rick_Pi]

Great video ❤😊

[@ahmetozbekler]

Very simple, very clear and very good explain for understanding. Thanks 👍👏👏👏👌

[@wbreslyn]

Glad it was helpful!

[@NiharikaAChirayil]

Thanks for the video it helped me out a lot!

[@wbreslyn]

Excellent!

[@tocabenny2821]

Thanks about this information about boiling. It was so useful 😃😊👍🏻😄

[@NPC-et9ik]

With the syringe example, what's the likelihood you are only observing dissolved gases escaping the liquid as bubbles and not actually observing boiling?

[@wbreslyn]

That's an excellent question. To be sure I'd need to calculate how much gas can be dissolved in that volume of water at that specific temperature. I could then make a rough comparison to the bubbles I'm seeing in the syringe. Quite a large number of bubbles are observed, more I believe than can be dissolved in that amount of water. I also can compare it to boiling on a hotplate where the bubbles just keep coming and coming until the water is gone. I can't see how those bubbles would be atmospheric gases! But for the syringe the calculations would be interesting to do (if I had time...). Thanks for an intriguing question. --- Dr. B See www.wiredchemist.com/chemistry/data/solubilities-gases for solubility data.

[@rahulmosalpuri9491]

@@wbreslyn i have one more question, then why water does not convert into vapor in space, we seen water floating in the space. so if there is no atmospheric pr. and then vapor pr. of water should be exceed that zero pr.

[@wbreslyn]

That is a very perceptive question. When you see water in space it is inside of a space capsule or the space station. Those areas are pressurized otherwise the astronauts wouldn't be able to survive. In fact, this happened briefly and "the man reported that his last memory before blacking out was of the moisture on his tongue beginning to boil..." See: www.scientificamerican.com/article/survival-in-space-unprotected-possible/ --- Dr. B

[@yolanankaine6063]

Very well explained

[@rojadaki]

Isn't 50 km a bit too much of a height for humans to breathe? Or even 10km? 1:20

[@imaginaryuniverse632]

Nice video 👍 Is there a difference between the empty space in a bubble and the empty space in outer space?

[@wbreslyn]

The bubble is full of H2O molecules in a gaseous form. So it's not empty like outer space.

[@kanchanthakur7428]

Thanks for such a nice explanation

[@wbreslyn]

Glad it was helpful!

[@anmolguptanm7515]

I m so curious to know what is boiling point, and I get the feel of boiling point. I appreciate your efforts

[@missionimpossible8961]

Genius explanation

[@wbreslyn]

Glad it was helpful!

[@virenderbhardwaj3137]

but why temperature becomes constant during boiling and doesn't increase further even on adding heat?? if its just the game of bubbles it doesn't the explain why the temperature can't rise further ,,,if I say that below 100 degrees the energetic water molecules forms bubbles but those bubbles don't have that much vapor pressure so it collapses but at 100 degrees they have enough vapor pressure to escape but even above 100 degrees the bubble have more pressure right? and more bubbles will form because there will be more no. of enough energetic molecules ....so why it doesn't rise above 100 degrees ?

[@kubramali4749]

thankx for an amazing explanation. ..amazing help for class lecture~

[@madalixful]

Amaaazing explanation, thanks a lot!!!

[@wbreslyn]

You are welcome!

[@PritamSaikia-g4e]

does vapour pressure act only against the air molecules and not on the surface of liquid?

[@dulmin_]

1:56 Destiny

[@pankajsarang1067]

Nice video sir💥💥

[@georgiion1684]

best possible video thx

[@wbreslyn]

You're welcome!

[@Singingplus2]

Wow brilliant 👏👏sir I under Crystal clear this topic

[@Rahul-oy1vo]

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?

[@agranavaratne7731]

Isn't the vapour pressure some parameter in a closed vessel? And not an open one, pls explain... Btw best video on this topic on KZbin!

[@wbreslyn]

Thanks! It doesn't have to apply to only a closed vessel.

[@agranavaratne7731]

@@wbreslyn ohhh I see thanks alot sir!! Great video!!

[@rashmiyasora1523]

Thank you 💜

[@Rahul-oy1vo]

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?

[@deeperloveforphysics9513]

Great video

[@wbreslyn]

Thanks! I thought you might find it useful.