why does a filter flask get cold while using a water aspirator?

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2007-09-12 16:56:30 · 2 answers · asked by knight19 1 in Science & Mathematics ➔ Chemistry

The gas law.
As pressure drops, so does temperature.

2007-09-12 17:02:23 · answer #1 · answered by Irv S 7 · 0⤊ 0⤋

When pressure is reduced some water vaporises. A change of state from liquid to gas requires absorption of heat so the flask gets colder.

2007-09-13 00:02:09 · answer #2 · answered by Aurium 6 · 0⤊ 0⤋