Why Does Compressed Air Cold

Changing from a liquid phase to a gas phase requires energy.

Why does compressed air cold.

Long ago i was a pc tech at a slightly fly by night mom pop joint. If this is true why use compressed air. Updated april 24 2017. The lower you are closer to sea level the higher the pressure because there will be more air pressing down on you.

If we take a look at our earth s surface and its atmosphere we can interpret it as a sea of air. Skip navigation sign in. Co2 cartridges are highly compressed cylinders of liquid carbon dioxide. Why does the compressed air can get so cold when you use it.

The higher you are in this ocean the lower the pressure would be. I m not even sure if the liquid is electrically conductive but it boils off in seconds anyway. A pocket of gas sits at the top of the can preventing liquid from spraying out when the can is right side up. If you ve ever used a can of compressed air to blow dust out of your keyboard you ve experienced how quickly the can gets cold.

Even a short blast is enough for frost to accumulate. I will take a stab at putting that in simple terms. Why does the compressed air can get so cold when you use it. Why does canned air get cold.

A given volume of gas has a certain amount of energy. 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 does canned air get cold. As the liquid co2 is released it turns into a gas and makes your cartridge ice cold.