how does air pressure affect water boiling/ freezing points
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Air pressure has a significant impact on the boiling point – liquids enter the gas phase much more readily at lower pressure.
You can boil water at room temperature with sufficiently low pressure.
It has a much smaller effect on freezing point. Water is a fairly unusual material that expands as it freezes, so increasing the pressure makes it slightly harder to freeze and lowers the freezing point – but you need *a lot* of pressure to notice a difference.
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