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- Dictionaryboil·ing point/ˈboiliNG ˌpoint/
noun
- 1. the temperature at which a liquid boils and turns to vapor: "pour in the water (not at boiling point but just below)"
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noun
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The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. The boiling point of a liquid varies depending upon the surrounding environmental pressure. A liquid in a partial vacuum, i.e., under a lower pressure, has a lower boiling point than when that liquid is at atmospheric pressure. Wikipedia