Boiling point
Boiling Point
The Boiling Point (pronunciation: /ˈbɔɪlɪŋ pɔɪnt/) is a fundamental concept in thermodynamics and physical chemistry. It refers to the temperature at which a liquid turns into a vapor or gas under specific atmospheric pressure conditions.
Etymology
The term "boiling point" originates from the physical process of boiling, where a liquid changes to a gas or vapor state. The word "boil" comes from the Old French bouillir and the Latin bullire, both meaning "to bubble up".
Definition
The boiling point of a substance is the temperature at which the vapor pressure of the 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 vacuum has a lower boiling point than when that liquid is at atmospheric pressure.
Related Terms
- Melting Point: The temperature at which a solid becomes a liquid at atmospheric pressure.
- Freezing Point: The temperature at which a liquid turns into a solid when cooled.
- Sublimation: The process in which a solid changes directly into a gas without first becoming a liquid.
- Condensation: The change of the physical state of matter from gas phase into liquid phase.
- Evaporation: The process by which water changes from a liquid to a gas or vapor.
See Also
External links
- Medical encyclopedia article on Boiling point
- Wikipedia's article - Boiling point
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