Canned Air

So I just bought my first bottle of canned air to clean out my pc. I was using it on my keyboard for about 60sec and I noticed the can was getting extremely cold. I kept using it and it got so cold that a layer of frost formed around the can. It says not to shake or tilt etc...so I dunno if this is normal or what.

Also, how are you supposed to clean the inside of you laptop if you're not supposed to tilt the can? -_-. Pick the whole laptop up and hold it in the air?

 

you can tilt the can, the only reason they want you not to tilt it is because if you tilt it too far, liquid comes out and it freezes on contact, which causes frostbite. the companies just dont want to get sued for someone being childish.

 

Most cans come with a detachable nozzle...


USE IT!

 

Wrong, if you tilt it and the frost gets on your components, they may get damaged for obvious reasons. Also, the can is supposed to get cold, they say it on the side of the can and the more scientific guys around here will be able to explain it wordily to you, if it didn't, you should worry.

 

Yeah, that freezing effect is normal anytime you rapidly change a liquid into a gas(Happens on propane tanks also). Turning it upside down makes for great coolant, its good for freezing gum thats stuck in carpet, then digging it out.

 

lol, i used it on my old laptop to cool it down . dropped the temps by about 13 degrees for a couple mins. lol.

 

if you see a spider you don't like put the can upside down and spray the spider. instant death.

 

Guys its an exothermic reaction, that is why it is getting cold. The can is not supposed to be shaken, because the petroleum based propellant will come out of the can. If you shake the can, some of the propellant will get above the compressed air, and will come out, which is not good for electronics, your skin and the environment.

K-TRON

 

I also recommend based on a personal experience that you do not shoot one of these with a BB Gun

 

*puts down BB gun* And why would that be?

 

As a side note, canned air is so very fun to play with on a boring work day. There's a reason I've been barred from ordering any more boxes of canned air.

 

My can can tilt any which way and is eco friendly XD suriosly.

XD

It actually works to get rid of stuck pixels I fixed a few of mine after massaging failed by blowing canned air at it

 

GOSH I LOVE PLAYING AROUND WITH COMPRESSED AIR!!! I love freezing stuff, and spraying around to scare people, SO MUCH FUN!

If you tilt it, the liquid inside will come out, as a liquid, for a few moments and cause damage.

Playing around with gases and compressed gas containers is fun! Take a plastic lighter and throw it on the sidewalk really hard (away from yourself)and watch it burst, kinda cool lol.

 

Now I know what to get you guys for x-mas a big box of canned air and let you have a ball.

 

They do have cans that dont such as mine.

 

As the pressure in the can decreases, the temperature also decreases. PV=nRT, where P=pressure, V=volume, n=amount of gas, R=constant dependent on units used, T=temperature

 

Yup, it's a physics question, not a chemical reaction question.

 

The ones I get at work, you have to screw a nozzle onto the can, and if you want to squirt the liquid out... just empty one half empty and cold to the point where you can't spray any more air out, unscrew the nozzle and the liquid shoots out like a water gun

 

u learn something new everyday =]

 

LMAO!