Why Does Compressed Air Cold

Why does the compressed air can get so cold when you use it.

Why does compressed air cold.

Changing from a liquid phase to a gas phase requires energy. Most techs were stuck in a back building connected by a ma. Why does canned air get cold. Even a short blast is enough for frost to accumulate.

This frost all over the cylinder sort of cold is thermodynamics in action. As the liquid co2 is released it turns into a gas and makes your cartridge ice cold. 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. Co2 cartridges are highly compressed cylinders of liquid carbon dioxide.

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. Updated april 24 2017. If you compress it into a smaller space the energy also becomes more dense so the temperature has to rise at least temporarily.

If this is true why use compressed air. Why does the compressed air can get so cold when you use it. The lower you are closer to sea level the higher the pressure because there will be more air pressing down on you. 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. I will take a stab at putting that in simple terms. Long ago i was a pc tech at a slightly fly by night mom pop joint. A pocket of gas sits at the top of the can preventing liquid from spraying out when the can is right side up.