Vapor

Vapor (British English: vapour) is when small drops of liquid float in the air. Sometimes this happens because the liquid has been heated. Vapor is not the same as gas. It is a mixture of liquid and gas. The usual word for this is steam.

Vapor Media

• Nitrogen dioxide gas.jpg

  An ampule of nitrogen oxide vapor: brown nitrogen dioxide and colorless dinitrogen tetroxide, in equilibrium

• Phase-diag2.svg

  The vapor-liquid critical point in a pressure-temperature phase diagram is at the high-temperature extreme of the liquid–gas phase boundary (the dotted green line gives the anomalous behaviour of water).

• Binary Boiling Point Diagram new.svg

  Liquid–vapor equilibrium

• Vapor being used in a cloud chamber.jpg

  If the vapor pressure exceeds the equilibrium value, it becomes supersaturated and condenses on any available nucleation sites e. g. particles of dust. This principle is used in cloud chambers, where particles of radiation are visualized because they nucleate formation of water droplets.

• Crepuscular Rays Beam through the Mist Blown from Takkakaw Falls.jpg

  Invisible water vapor condenses to form visible water droplets called mist