how does boiling point of a liquid vary with pressure
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The boiling point of a substance is thetemperature at which the vaporpressure of the liquid equals thepressure surrounding the liquid and theliquid changes into a vapor. ... A liquidin a partial vacuum has a lower boiling point than when that liquid is at atmospheric pressure.
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The boiling point of water, or any liquid, varies according to the surrounding atmospheric pressure. A liquid boils, or begins turning to vapor, when its internal vapor pressureequals the atmospheric pressure. ... Putting a liquid in a partial vacuum also will lower its boiling point.
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