Vapour Pressure Crash Course

Рет қаралды 2,960

2 жыл бұрын

To know why things evaporate and why things boil (as well as what the difference is) you need to understand vapour pressure.
00:00 Daily photos of liquids
01:16 Liquids can evaporate below their boiling point
02:37 Measuring vapour pressure
03:58 Antoine equation
04:41 Boiling
06:34 Mixtures
Process with Pat is the place to come for perspective and to ask stupid questions. I want you to leave more knowledgeable, confident, motivated, and most importantly, curious. I also want to invigorate a field that seems tired and uninspiring, at least if you get your perspective from internet forums. These are not lectures. This is a place for you to leave thinking “Oh! That’s why...”
This channel is not only for chemical engineers - anyone who works with processes should be able to find something of value here.
#ProcessEngineering
#ChemicalEngineering
#ProcesswithPat

Пікірлер: 11

@acopp6891 2 жыл бұрын

Excellent. So simple and very well depicted. I remember studying this during my chem engineering course and always struggled with the concept of "vapour pressure". This a SURFACE PHENOMENON (for example, cooling towers works according to this type of phenomena but in a different way), not an BULK one (such as boiling that you also explained very well) There is something that I appreciate very much about these videos and is its DURATION. Because if you make a 30 min video explaining a particular topic with ecuations, examples and so on, most people end up more confused Nice job man! Greetings from a "country" called Argentina

@ProcesswithPat 2 жыл бұрын

Thanks so much ACopp. I like your point about surface vs bulk phenomena, and in fact it has given me an idea - vapour pressures of immiscible mixtures…. These are additive which is different to miscible mixtures where the vapour pressure is intermediate. I wonder if there is a cool way to show the difference when you have one phase settling on top and exerting its own vapour pressure, compared to that same mixture under rapid agitation exerting the sum is the two vapour pressures…. Love to Argentina (I have a friend who is equally sarcastic about the place, but the people seem fantastic!)

@acopp6891 2 жыл бұрын

@@ProcesswithPat haha! really?...it’s not so difficult to make jokes about Argentina, isn’t it? 😆...but yeah, there are still some decent people It’s a very interesting idea to see what happens experimentally with immiscible substances. Or partially miscible ones like phenol-water. With your style of explaining and the editing, I reckon it would be much more understandable as things start to get a bit more complex with more substances

@ChemEngWeekly 2 жыл бұрын

Very good explanation Pat! The demonstration clips really help bring the thermodynamic concepts to life 👍

@ProcesswithPat 2 жыл бұрын

Thanks. Yeah it’s nice to verify that things actually work!

@ChemEngWeekly 2 жыл бұрын

100% agree!

@AeroDucation 2 жыл бұрын

Thanks u so much for explaining and giving out such nice detailed clear information .I hope u have a great happy life ahead

@elliea2339 2 жыл бұрын

Just took this chapter in thermodynamics and I understand it more now thanks to you. Great work.. keep up such work💪🏻

@ProcesswithPat 2 жыл бұрын

Oh nice! Good timing then, huh? Best of luck with the thermos!

@chirsing6258 2 жыл бұрын

Amazing 👏

@ovindu7511 3 ай бұрын

Chemeng student here, I’m a little bit confused. I thought the reason that liquid evaporates at toom temperature is because the fugacity of the component in the liquid (P*i times xi) is greater than in the atmosphere (P times yi)