2006-10-02 21:59:00 · 8 answers · asked by Gareth 2 in Science & Mathematics ➔ Chemistry
Yes, very rapidly - it boils when its vapour pressure is equal to or greater than the applied pressure. The energy required to vapourise the water is derived from the sensible heat of the water so it cools . Incidentally so does ice at 4mm Mercury when it sublimes.
RoyS
2006-10-02 22:03:10 · answer #1 · answered by Anonymous · 0⤊ 0⤋
This is a theoretical question. When water molecules have enough energy to escape the liquid they will. When the pressure above a vessel containing water is reduced the boiling point of the water decreases. Under laboratory conditions it would not be possible to create a vacuum over the vessel containing the water as in doing so the water would in practise start to evaporate long before a vacuum was created. The evaporated water would in itself increase the pressure above the water and a constant draw of pressure would be needed to try and create the vacuum - so in practise the water would evaporate long before any vacuum could be effectively created.
2006-10-03 00:54:26 · answer #2 · answered by advent m 3 · 0⤊ 0⤋
It doesn't heat up, but it evaporates. That would be why water boils more quickly at higher altitudes. You can simply look at a graph of the triple-point of water to tell how and when, exactly.
It 'goes' to fill up the vacuum. If we are talking about a definite sized vacuum, then it would fill it to some density and then stop. If we are talking about an open-ended vacuum, it would just reach thermal equilibrium after some amount of time.
2006-10-02 22:10:37 · answer #3 · answered by Jonny Jo 3 · 0⤊ 0⤋
It evaporates very quickly in vacuum as there will not be any other particles (i.e water molecules) in the vacuum above it (i.e. zero pressure from above).
You can also see it as 0% humidity above the water, and hence it will evaporate quickly to try to maintain equilibrium.
2006-10-05 00:46:52 · answer #4 · answered by Kemmy 6 · 0⤊ 0⤋
Yes. And rather rapidly since there is no partial pressure of water vapor to limit its evaporation rate as there is in Earths atmosphere.
Doug
2006-10-02 22:03:18 · answer #5 · answered by doug_donaghue 7 · 0⤊ 0⤋
In a fridge when the ammonium is compressed it becomes a gas again (in other words, you need a new fridge.) So I should think water would boil bloody fast. Yet, if you are in space it freezes instantly and frozen piss has to be melted off the waste tube, so it depends what kind of vaccum you are talking about!
2006-10-02 22:14:37 · answer #6 · answered by Anonymous · 0⤊ 0⤋
NO.. Not at all,
How it is possible water molequel present in vacuum ?
A vacuum is a volume of space that is substansively empty of matter.
2006-10-02 22:39:20 · answer #7 · answered by mkothari_mt_abu 1 · 0⤊ 0⤋
but where does it go?
2006-10-02 22:08:47 · answer #8 · answered by thrag 4 · 0⤊ 0⤋