Water Vapor

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Water Vapor is called aqueous vapor, moisture. Water substance in vapor form; one of the most important of all constituents of the atmosphere. Science On a Sphere, NOOA see link [1]
Water Vapor is called aqueous vapor, moisture. Water substance in vapor form; one of the most important of all constituents of the atmosphere. Science On a Sphere, NOOA see link [1]


Water Vapor is called aqueous vapor, moisture. Water substance in vapor form; one of the most important of all constituents of the atmosphere.

Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice.

Under typical atmospheric conditions, water vapor is continuously generated by evaporation and removed by condensation.

It is lighter than air and triggers convection currents that can lead to clouds.

[edit] Evaporation/sublimation

Whenever a water molecule leaves a surface, it is said to have evaporated. Each individual water molecule which transitions between a more associated (liquid) and a less associated (vapor/gas) state does so through the absorption or release of kinetic energy.

The aggregate measurement of this kinetic energy transfer is defined as thermal energy and occurs only when there is differential in the temperature of the water molecules.

Liquid water that becomes water vapor takes a parcel of heat with it, in a process called evaporative cooling

The amount of water vapor in the air determines how fast each molecule will return back to the surface. When a net evaporation occurs, the body of water will undergo a net cooling directly related to the loss of water.



[edit] Also See

[edit] Reference

  • See Wikipedia Water vapour [2]




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