2007-09-16 06:38:45 · 8 answers · asked by pHiLlY 1 in Science & Mathematics ➔ Chemistry
The propellants and solvents used in the aerosol cans are in a liquid state, when you spray the pressure inside the can is lowered the lower pressure allows the propellant and solvents to evaporate causing a decrease in the temperature of the liquid phase.
2007-09-16 06:51:51 · answer #1 · answered by milton b 7 · 1⤊ 0⤋
Releasing the contents causes a brief vacuum (lower pressure) in the can. Based on the gas laws, since the volume of the can is fixed, the temperature goes down.
2007-09-16 13:41:08 · answer #2 · answered by reb1240 7 · 2⤊ 0⤋
Any compressed gas-when released absorbs heat--in the case of spay can's the heat as it leaves the can at the nozzle-absorb es heat--when you have no heat-you have cold--the cold travels down the out side of the can-basically-when a gas is compressed--it loses heat-or one could say the heat is squeezed out-when the gas is allowed to expand--it adsorbs heat around the nozzle as it leaves the can- and thus causing coldness
2007-09-16 14:05:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
When a gas expands its heat energy has to be spread over the whole volume, when the volume increases the overall temperature appears to decrease. And it does in a localized area.
2007-09-16 13:43:09 · answer #4 · answered by Anonymous · 1⤊ 0⤋
rapid decompretion from any sort of can causes the CO2 to frezz on the out side of the can.
2007-09-16 13:40:49 · answer #5 · answered by BB 3 · 0⤊ 1⤋
As the velocity head is more the pressure head is low. low pressure head results in low temperatures. (Bernoulis princple)
2007-09-16 13:55:00 · answer #6 · answered by Apparao V 4 · 1⤊ 0⤋
because they have co2 in them. and co2 freezes when used
2007-09-16 13:41:25 · answer #7 · answered by oddball 1 · 0⤊ 1⤋
CO2
2007-09-16 13:42:34 · answer #8 · answered by Anonymous · 0⤊ 1⤋