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Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
This is more out of curiosity than anything but, here goes. When water is place in a vacuum it turns into a gas as everybody knows but, if its in a sealed chamber this will cause the pressure to go up. At what pressure would the water stop evaporating? Is there a way of determining this other than experimentation?
Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
Thanks! I tried looking on wikipedia first but, I guess I just used the wrong keywords. Unless anybody has anything spectacular to add then we can just let this thread die.
Registered Member #2028
Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
The same happens if you heat water in a sealed chamber, the pressure will be equal to the vapour pressure at that temperature. Thats also why liquid C02 remains a liquid until the tanks valve is opened.
This steam rocket works by keeping very hot water liquid under its own vapour pressure. When the pressure is released, the water boils and expands many times its initial volume.
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Water in a vacuum
