As we raise the temperature of a liquid, more of its molecules can escape, raising the vapor pressure.
 When the vapor pressure reaches the ambient pressure, we have boiling. The normal boiling point is the boiling point at 1 atm pressure. |
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As we raise the temperature of a liquid, more of its molecules can escape, raising the vapor pressure.
When the vapor pressure reaches the ambient pressure, we have boiling. The normal boiling point is the boiling point at 1 atm pressure. |