When the air in the atmosphere heats up do the paticles move father apart?

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Offline thedoc

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Daylan asked the Naked Scientists:
   
When the air in the atmosphere heats up, do the paticles move father apart?

What do you think?
« Last Edit: 29/09/2012 14:30:01 by _system »

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Offline Phractality

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Daylan asked the Naked Scientists:
   
When the air in the atmosphere heats up, do the paticles move father apart?

What do you think?
Yes. It's called the Ideal Gas Law. Heating makes a gas at a given pressure less dense; the same mass occupies a larger volume. That's why hot air rises. The molecules don't get any bigger; they just bounce off of one another harder, so it takes more pressure to confine them in a given volume.
Imagination is more important than knowledge. Einstein