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This video is about compressed air cans (aka gas dusters) and why they get cold when you spray them. They cool off because the refrigerant inside (1,1-difluoroethane) is under pressure and boils off when the pressure lowers, and energy lost to the latent heat of vaporization cools the can a lot. Difluoroethane normally boils at -25°C (-13°F), but under ~6 atm (6 bar, 600 kpa) it is a liquid at room temperature. The gas also cools off slightly due to the Joule-Thompson effect of fluid expansion through a throttled valve. Difluoroethane is heavier than air and water soluble, so it is recommended to use it in a ventilated environment to clean your keyboard, etc. Also, 1,1-difluoroethane is a potent greenhouse gas. It is also known as Freon 152a, Ethylidene difluoride, Ethylidene fluoride, HFC-152a, R-152a, and DFE.
Thanks to Tino and Hannah!
REFERENCES
CRC Air Duster Safety Data Sheet
Latent Heat of vaporization
1,1-difluoroethane chemical and physical properties
1,1-difluoroethane on wikipedia
Free Expansion of Real Gases, Goussard, 1993
Joule-Thompson Expansion Course Notes
Properties of 1,1-difluoroethane
Medical Effects of difluoroethane
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Chúng tôi Hy vọng rằng những bái hát về chủ đề shake it off nghĩa là gì mà chúng tôi cung cấp sẽ có giá trị cho bạn. Xin chân thành cảm ơn.
Tìm kiếm liên quan đến chủ đề Why Do Compressed Air Cans Get Cold?.
shake it off nghĩa là gì
physics,minutephysics,science,difluouroethane,difluoro ethane
#Compressed #Air #Cans #Cold
So basically, it works on the same principle as, say, an air-conditioner evaporator coil.
I don't know if it's just me, but I think the background sound in this one seems distracting compared to your other videos. Maybe it's just me.
i found one random video on this channel, and know i am a full blown addict and cant find the will power to stop watching
So, it is a clever system to create a pressure outward since there is pressure inward, which liquid is necessary that it converts into gas so that take energy to outward, so it need inward energy that holds the gas, which the gas hold the liquid below, so need strong can to hold it, so gas is the medium that need to be high enough to hold the liquid and liquid need to be low enough so it converts into gas so it comes out as gas, but is a mist, so it is a mist can. So, the pressure different between liquid and mist need to be high enough as a barrier in between, so it is not pure mist, but pure liquid but convert into mist outward, so the liquid goes down but the gas goes up, so liquid is need so it pushes upward the gas to outward? Or it can be pure gas, so there is no liquid and mist, just pure gas. So, why mist is there? Because there is visual so that is why there is a mist so you can see. So, it is about convert two different pressure base on your action so it converts into liquid from mist, so increasing the pressure so become liquid from mist. If you shake so the pressure change and also if you press the spray the pressure change within so come out in high pressure so become cold and with cold, is impact to cause dust to be push away.
Compare to compress air, so what is same and different? So, the air itself is compress within to fill the space, so high pressure within so outward there is high pressure, so within the compress air so the press will be reduce so air within compress is not same as before? For this one it is same as always? Since there are two different phase that create a pressure within so it holds it until liquid run out which gas run out, well, the mist, since the liquid is bottom of the mist, so the tube is at bottom which suck up the liquid or wherever the tube is to suck up?? So, it is at the top, then it sucks up the mist which create a vacuum outward so the mist raise as liquid decrease, so liquid is convert into mist so it bubbles up into mist. For air compress, so there is no bubble up, just outward gas that is all. The bubble is a sign of convert phase or creating a pressure system which within bubble is different from above. That the bubble within is something else. So, holding the pressure, then release the pressure. Also it releases the pressure within, to be accurate it is converting the pressure within which inside has two different phase. Compress air is one phase.
i froze my finger with it today and had to defrost it
As a corollary, this is why you need carb heat even in a hot summer day in a piston airplane (prop airplane)
My dumb ass thought it said shake, a minute later I’m like why does my hand hurt and feel so cold… frostbite!
So this's how an air conditioner is made
weirdly enough, my can has instructions TO shake before usage.
Why do they call it compressed air? More like compressed 1,1-difluoroethane, am I right?
Well thank God I did not major in physics..I hv no clue what this dude is talking about.
Molecules have kinetic energy. The sum of these kinetic energy determines the temperature.
When you release some molecules out of the can, the total kinetic energy in the can has decreased.
Ever tried putting the can under hot water when it's that cold It reverses the process And actually makes the air spew a little faster
Bruh why people call it compressed air if it's Difluoroethane
why would anyone use this
Theres other ways to remove dust
Difluoroethane has a high global warming potential, 124, which is 124 times higher than CO2
They are an environmental nightmare
edit; and cans with tetrafluoroethane have a GWP of 1300 (!!!) and lasts for 14 years.
The cans are aluminum whose production pollutes astronomically
just everything about pressured gas cans is an environmental nightmare
also at 2:10
wierd thing happend at 0:51
Question so I just bought some to dust some figures cause my friends suggested it and I’m wondering where should I keep them
If the whole story is of pressure , so it means that we can cook food faster deep inside the earth and oceans 🙂
Assume the same would apply to bbq gas cylinders?
Why did I always think these cans were full of nitrous oxide
One time I filled a grocery bag with that and saw god and Satan simultaneously
I froze my finger that way also food after watched it shattering i did it to a thermometer realy cold
Turn up your heads phones all the way before you watch at 3:39 for an Easter egg he hid in the video
Whaat a guy!
laughs in Le Chatelier's principle
It never got cold for me
because I never used it
Ooh this is how the earth is round!!
in simple…….
its due to thermal properties of matter and thermodynamics
I flipped it over and shot my leg with it and it burnt and hurt
I'll just take my laptop at the tire shop and use an air hose
엑스비디오보다 총알티ㅂŀ 개좋네 남자들이라면 꼭 봐야한다 돈드는거 없음
유튜브 아이돌닮은 꼴 총알ㅌł비에 있다길래 들어가봤더니 옛날 전여친이 벗1방하더라…
총알ㅌł비광고 보다가 들어갔는데 와 여자 분1수하는거 지리더라 돈안내고 봤는데 쩐다…
하도 댓글광고하길래 총알티ㅂł 들어가봤는데 진짜 딱풀녀 벗1방하는것도 봄 ㅋㅋㅋㅋㅋ개꿀
총알ㅌłㅂł들어가봤는데 야한거 ㄹㅇ 무료로 봐지던데 ㄷㄷ 무료로 봐도되는거임?
사촌형이 총알티ㅂł 보길래 나도 봤었는데 와 진짜 좋긴하더라…
댓글 보고 총알티ㅂŀ 잘 들어갔습니다. 너무 행복했어요
인생에 다섯 글자만 기억하면 됩니다. 총알ㅌł비
믿고 정말 총알ㅌł비 들어갔는데 ㄹㅇ 개쩔더라 특히 밤에 여캠들 다벗는데 꽁으로
Ok once more for the slow guy -> While I understand that pressurising a gas liquefies it by making the molecules closer together, I don't see why that would also make it colder. Shouldn't it just be a warm liquid?
Fantastically explained
We use the liquid to cool overheated motors is robotics.
I was honestly wondering what liquid was inside and why it cooled off enough to allow formation of frost. I looked it up but it didn't really help but now I know. Thanks!
I'll save you 6 minutes of your time:
It's due to depressurization combined with the certain liquids and gasses inside the can that makes the endothermic process exaggerated.
The end.
👁👄👁
Just casually venting refrigerant, it’s legal if it’s in a can though