Q.):-  How does evacuation of the chamber enhance evaporation?
If water at 0 ° C, kept in a container with an open top, is placed in a large evacuated chamber:
1.  all the water will vaporize
2.  all the water will freeze
3.  part of the water will vaporize and the rest will freeze
4.  ice, water and water vapour will be formed and reach equilibrium at the triple point.

Solution:-
Evacuation will greatly enhance evaporation leading to heat loses by water.  As water is 0 ° C, it begins to freeze. After some time, a part of water will vaporise and the remaining will freeze.
C is correct.



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