- #1
AbsoluteZer0
- 125
- 1
Hi,
As I understand, by placing water in a vacuum and decreasing pressure, vapor pressure will subsequently be increased causing the water to boil. The water will then evaporate, which will cool the water that is left behind. Further evaporation over a period of time will drop the water temperature to a level suitable for freezing, and the water will then freeze at the top.
It seems pretty clear-cut, but I am struggling to understand how decreasing atmospheric pressure increases vapor pressure. What is the cause of this?
Thanks,
As I understand, by placing water in a vacuum and decreasing pressure, vapor pressure will subsequently be increased causing the water to boil. The water will then evaporate, which will cool the water that is left behind. Further evaporation over a period of time will drop the water temperature to a level suitable for freezing, and the water will then freeze at the top.
It seems pretty clear-cut, but I am struggling to understand how decreasing atmospheric pressure increases vapor pressure. What is the cause of this?
Thanks,