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Homework Help: What happens after the air is evacuated?

  1. Sep 16, 2010 #1
    1. An airtight glass container contains a bowl of water. The temperature of the water is measured. If the air is extracted out of the container what happens to the water?



    2.
    A) The water starts boiling and the temperature increases
    B) The water starts boiling and the temperature decreases
    C) The water freezes and the temperature increases
    D) The water freezes and the temperature decreases




    3. To my mind the water would start boiling due to the reduced air pressure enabling free movement of the water molecules to become vapour. But this loss of steam from the liquid should mean that the remaining water gets colder due to its effective loss of energy since ther is no mention of an external heat source

    Any perspective on my conclusions would be greatly welcomed
     
  2. jcsd
  3. Sep 16, 2010 #2

    ehild

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  4. Sep 17, 2010 #3
    Thanks very much! That was exactly what I was looking for :smile:
     
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