2007-11-20 07:50:45 · 4 answers · asked by ang 1 in Science & Mathematics ➔ Chemistry
No it a physical change but not a chemical change. In order for a liquid to evaporate it must acquire heat to change state that heat is being drawn from your skin, and thus is feels cool when evaporation takes place.
Sweat cools our bodies using the same principle.
2007-11-20 07:54:11 · answer #1 · answered by Brian K² 6 · 1⤊ 0⤋
Anything feels cold as it evaporates from the skin, which is how sweating helps keep you cool. Acetone feels particularly cold because it has a low boiling point, and therefore a high vapour pressure at body temperature.
The cold comes from the energy required to turn a liquid into vapour, which means separating the molecules from each other. This is a physical, rather than a chemical, process. There are attractive forces between acetone molecules, but not actual chemical bonds.
2007-11-20 16:01:53 · answer #2 · answered by Facts Matter 7 · 1⤊ 0⤋
As a substance turns from a liquid to a gaseous state the molecules become more excited. This means they have more energy. This energy has to come from somewhere, and it is taken from the heat in your skin which makes your skin feel cooler.
2007-11-20 15:58:19 · answer #3 · answered by insomnia c 4 · 1⤊ 0⤋
No. It is physical.
Acetone molecules take the energy (heath) from your skin to manage to evaporate.
2007-11-20 15:55:00 · answer #4 · answered by PragmaticAlien 5 · 1⤊ 0⤋