Why Is Compressed Air Cold Upside Down

Because these gases are compressed to liquid form when you turn the can upside down and press the nozzle liquid will come out before it turns to gas.

Why is compressed air cold upside down.

Canned air is one of many inhalants that can be abused. The liquid which is sprayed while the can is upside down absorbs more heat as it changes from a liquid to a gas when sprayed. Gases compressed into liquids absorb much energy upon vaporization which is why under normal use the can becomes quite cold to the touch. Jul 15 2003 4 the can freezes as the pressure inside is released.

As you have noted this liquid quickly evaporates because is is a gas at room temperature. A pocket of gas sits at the top of the can preventing liquid from spraying out when the can is right side up. Holding it upside down makes the pressure release faster because. Turning the can upside down and spraying does not allow for the liquid to immediately vaporize and therefore turns the can into a freeze spray.

As for why it gets cold. This same reason causes compressed air to feel cold as it expands and draws heat from its surroundings. Since some of the gases are heavier than air when turned upside down the can will spray out the liquid mixture before it has had time to mix with the lighter gases. Turn that cup upside down and you get all that cold slurpee goodness.

When you turn the can upside down the liquid is forced out instead. Removing heat and making the can or nozzle cold. The duster can is made so it will just take air out because the intake is at the top like trying to suck on a slurpee with the straw at the top of the cup. Begingroup georg it s called compressed air but it s not actually 78 nitrogen.

Apr 28 2000 15 995 1 81. Similarly turn the can upside down and you re shooting out the liquid propellant instead. Jul 15 2003 9 physics. When compressed into the can this mixture takes fluid form.

And when you have it down below it can not blow out. Someone else may be able to explain it more accurately but i think that s the general idea.