2006-09-18 12:12:19 · 6 answers · asked by dvs52703 1 in Science & Mathematics ➔ Other - Science
The space between the molecules expands
2006-09-18 12:15:26 · answer #1 · answered by freebird 6 · 0⤊ 0⤋
It all depends in what context you're talking about. If the air is confined, for example in a hot air balloon, heating the air increases the air pressure inside the balloon. That's why the balloon goes from a flat piece of fabric into a round balloon -- the increased air pressure caused by the heat causes the molecules of gas to hit the inside of the balloon with greater frequency and force. This phenomonon also explains why latex balloons burst when they touch a hot surface that's not hot enough to cause the latex to melt. the hot surface heats up the air inside the latex balloon very quickly, causing the the air molecules to hit the inside surface of the balloon harder and more frequently, until the elasticity of the latex reaches its limit and the balloon bursts under air pressure.
However, if you are talking about air that is not contained --- like in the atmosphere, it's a lot more complicated. There could be some decrease in air pressure with heating in some situations. It's too complicated to figure this out now.
2006-09-18 12:23:31 · answer #2 · answered by Marcella S 5 · 1⤊ 0⤋
You're talking weather, of course? In a closed container, heated air expands and makes pressure, like to run your car....The molecules want to get away from each other.
2006-09-18 12:20:09 · answer #3 · answered by whoknew 4 · 1⤊ 0⤋
Doesn't heating something increase the pressure?
2006-09-18 12:22:03 · answer #4 · answered by Paul 7 · 1⤊ 0⤋
The air is less dense, so the weight is less pressure per volume
2006-09-18 12:25:14 · answer #5 · answered by Courageous Capt. Cat 3 · 0⤊ 0⤋
on heating the molecules loose their density and move away.
2006-09-18 12:36:49 · answer #6 · answered by moosa 5 · 0⤊ 0⤋