Difference between revisions of "Phase instability"

From Glossary of Meteorology
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<div class="definition"><div class="short_definition">The [[instability]] associated with a supercooled or supersaturated [[phase]] of matter.</div><br/> <div class="paragraph">A small [[fluctuation]] (on a molecular [[scale]]) or foreign [[particle]] may cause change to a more  stable phase. For example, at a [[temperature]] below the equilibrium [[melting point]] of [[ice]], the ice  phase is stable, whereas liquid water is supercooled and is unstable because its chemical potential  is higher than that of ice. A small fluctuation such as collision with ice may cause the [[supercooled  water]] to change into ice.</div><br/> </div>
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<div class="definition"><div class="short_definition">The [[instability]] associated with a supercooled or supersaturated [[phase]] of matter.</div><br/> <div class="paragraph">A small [[fluctuation]] (on a molecular [[scale]]) or foreign [[particle]] may cause change to a more  stable phase. For example, at a [[temperature]] below the equilibrium [[melting point]] of [[ice]], the ice  phase is stable, whereas liquid water is supercooled and is unstable because its chemical potential  is higher than that of ice. A small fluctuation such as collision with ice may cause the [[supercooled water|supercooled  water]] to change into ice.</div><br/> </div>
 
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Latest revision as of 16:35, 25 April 2012



phase instability

The instability associated with a supercooled or supersaturated phase of matter.

A small fluctuation (on a molecular scale) or foreign particle may cause change to a more stable phase. For example, at a temperature below the equilibrium melting point of ice, the ice phase is stable, whereas liquid water is supercooled and is unstable because its chemical potential is higher than that of ice. A small fluctuation such as collision with ice may cause the supercooled water to change into ice.


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