Question

If water at $0^{\circ }C$, kept in a container with an open top, is placed in a large evacuated chamber,

• A. all the water will freeze.
  
• B. part of the water will vaporize, and the rest will freeze.
  
• C. ice, water and water vapour will be formed and reach equilibrium at the triple point.
  
• D. all the water will vaporize.
  

Answer 1

The correct option is B part of the water will vaporize, and the rest will freeze.


If water at $0^{\circ }C$, kept in a container with an open top, is placed in a large evacuated chamber, part of the water will vaporize and the rest will freeze.

This is because portion of water losing heat to freeze will be used by the other portion of water to vaporise.

FINAL ANSWER: (c).