What happens after the air is evacuated?

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When air is evacuated from an airtight glass container with water, the reduced pressure causes the water to boil, allowing molecules to escape as vapor. This boiling process results in a loss of energy, which can lead to a decrease in the temperature of the remaining water. The discussion emphasizes that without an external heat source, the water's temperature will likely drop as it loses energy during vaporization. The initial assumption that boiling would increase temperature is challenged by the energy loss associated with the phase change. Overall, the interaction between pressure and temperature in this scenario is crucial to understanding the behavior of water when air is removed.
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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
 
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Thanks very much! That was exactly what I was looking for :smile:
 
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