Why do highly pressurized cans/gas cylinders ( like eg. lighter gas, propane cylinders etc) go cold when the pressure is released?

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Why do highly pressurized cans/gas cylinders ( like eg. lighter gas, propane cylinders etc) go cold when the pressure is released?

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5 Answers

Anonymous 0 Comments

When you release gas from the cannister, the residual gas expand to fill the volume, doing so the molucules of gas slow down a little bit. And since the speed (/kinetic energy) of the molecules is perceived as heat, the gas is getting colder.

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