Vapour
Vapour
Vapour (pronounced: /ˈveɪpər/), also spelled vapor in American English, is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapour can be condensed to a liquid by increasing the pressure without reducing the temperature.
Etymology
The term "vapour" comes from the Latin word vapor, which means "steam, heat, exhalation".
Related Terms
- Gas: A state of matter consisting of particles with enough kinetic energy to move freely.
- Liquid: A nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.
- 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.
- Sublimation (phase transition): The transition of a substance directly from the solid to the gas state, without passing through the liquid state.
- Desublimation: The conversion of a substance from the gaseous to the solid state, bypassing the liquid state.
Medical Relevance
In the medical field, vapour is often used in the form of steam therapy, which is a common method for treating congestion, colds, and other respiratory conditions. It is also used in vaporizers for administering medications or for providing relief from certain conditions.
See Also
External links
- Medical encyclopedia article on Vapour
- Wikipedia's article - Vapour
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