Answer :
Final answer:
Liquids boil when their vapor pressure equals the external pressure, enabling them to boil at lower temperatures under reduced pressure.
Explanation:
Liquids boil when their vapor pressure becomes equal to the external pressure. If the applied pressure is reduced, the boiling point of the liquid decreases. Lowering the pressure means a lower vapor pressure is required for boiling, allowing the liquid to boil at a lower temperature.
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