alibaba Posted September 3, 2007 Posted September 3, 2007 at what temp approximately does the water start the process of turning to vapour in a closed bottle if heated? does it have to reach its boiling point of 100C to start turning to vapor or does this process begin well below the boiling point and reach its peak at 100C? is this the same or all liquids? thank you
hashashan Posted September 3, 2007 Posted September 3, 2007 The water will vaporize somewhat below. But as a matter of fact the H2O molecule changes phase from liquid to gas exactly in 100c in regeular athmospheric pressure. That means that if you heat your water(with a proper stirring) to the point when it starts to boil, both the gas and the liquid will be 100c. However some molecules can be liborated even in lower temperatures, therefore if youll put a glass with water it will eventually become empty even though it never reached its boiling point.
Mumbles Posted September 4, 2007 Posted September 4, 2007 I already warned you about not doing your homework for you. You're banned. Anyway, to really answer your question, water turns into vapor at all temperatures up to 100C. Even ice has a vapor pressure and can subliminate. There will always be an equilibrium between solid/liquid water and gas though. Since you are supposedly using a closed bottle, the temperature will be higher than 100C when it starts to boil.
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