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Chemistry  /  Chem 1410  ·  Atom · ~20 seconds

Boiling Point from Vapor Pressure

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A liquid boils at the temperature where its equilibrium vapor pressure equals the pressure of its surroundings.

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Water at a mountain campsite with lower atmospheric pressure reaches its boiling vapor pressure at a temperature below 100 °C.

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Boiling point is not a fixed property of a substance alone — it moves with surrounding pressure, only fixed once that pressure is specified.