Why Is Compressed Air Cold Upside Down

Why does canned air get cold.

Why is compressed air cold upside down. 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. Holding it upside down makes the pressure release faster because. And when you have it down below it can not blow out. When you turn the can upside down the liquid is forced out instead.

Similarly turn the can upside down and you re shooting out the liquid propellant instead. Apr 28 2000 15 995 1 81. When breathed in these gases can displace the oxygen in your lungs. A pocket of gas sits at the top of the can preventing liquid from spraying out when the can is right side up.

Gases compressed into liquids absorb much energy upon vaporization which is why under normal use the can becomes quite cold to the touch. 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. As for why it gets cold. This same reason causes compressed air to feel cold as it expands and draws heat from its surroundings.

Turn that cup upside down and you get all that cold slurpee goodness. Begingroup georg it s called compressed air but it s not actually 78 nitrogen. When compressed into the can this mixture takes fluid form. Jul 15 2003 9 physics.

As you have noted this liquid quickly evaporates because is is a gas at room temperature. In other words it begins to boil. Someone else may be able to explain it more accurately but i think that s the general idea. Canned air is one of many inhalants that can be abused.

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. Removing heat and making the can or nozzle cold.