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Thermal Physics

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28 Feb 2010 19:27:22 IST

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a closed bottle containing water at 0 degrees is opened in vaccum with no radiation it is

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a closed bottle containing water at 0 degrees is opened in vaccum with no radiation it is observed that all the water will a)vapouriseb)freezec)some vapourise & some freeze

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edison

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2 Mar 2010 16:06:05 IST

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Looking at the Phase diagram of water it is evident that water evaporates at lower pressures i.e B.P. and M.P decreases as pressure decreases, thus at vacuum the water at 0 degrees in a bottle is when opened then it

a) vapourises

edison

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2 Mar 2010 16:07:59 IST

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Thats why when water droplets enter the wrist watches it is kept in vacuum so that these water droplets are vaporised and it becomes vapor/water free to get rid of rusting and malfunctioning.

Guruprasad Raghavan

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2 Mar 2010 17:18:53 IST

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Edison Sir,

Could you please explain the Phase diagram once more. What i comprehend from the phase diagram is that water at 0 degrees cannot exist in vapour state, whatsoever be the pressure.

Please clear my doubt

G.Reshma begum

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18 Mar 2010 20:04:54 IST

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actually our sir told that some water vapourise & some will freeze as there is no chance of getting heat from any side as it is closed & it is opened in vaccum therefore some water wil freeze & release heat which is used by remaining water 2 vapourise

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