Fase transition - a photo on Flickriver

Fase transition

            Fase transition or sublimation, is when a substance makes a transition from the solid state to the gas state directly without going through the liquid state. At normal pressures, most chemical compounds and elements possess three different states at different temperatures. In these cases, the transition from the solid to the gaseous state requires an intermediate liquid state. Note, however, that the pressure referred to here is the partial pressure of the substance, not the total (e.g., atmospheric) pressure of the entire system. So, all solids that possess an appreciable vapor pressure at a certain temperature usually can sublime in air (e.g., water ice just below 0°C). For some substances, such as carbon and arsenical, sublimation is much easier than evaporation from the melt, because the pressure of their triple point is very high, and it is difficult to obtain them as liquids.
Sublimation requires additional energy and is an endothermic change. The enthalpy of sublimation (also called heat of sublimation) can be calculated as the enthalpy of fusion plus the enthalpy of vaporization. The reverse process of sublimation is deposition. The formation of frost is an example of meteorological deposition.
   

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Taken in: Nederland / Limburg / Montfort (show map)

Taken on: December 8, 2012

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Sets appears in: • Landscapes • B&W more » • Whatever the Weather • Nature in various forms • Winter 2012 - 2013 « less

Groups appears in: • Winter Wonderland • Monochromatic world more » • 100 views + 10 favourites (unlimited) • Life in Black & White • Digital Classic Black and White • Zwart-wit • VISUAL PLEASURE • De Doka • !! Winter in Nederland en België !! • Lighting Aspects • Fog & Mist • ! The BEST of Black & White Photography (NO SEPIA) • MONOCHROME AWARD - Admin invite - Post 1 and award 2 ,)Join New • Living in Black and White Photography • Theatre Of Life • Mordus de photos Monochrome • Tell me a story... (Show & Tell) • •our naive brains• • 美和藝術 Beauty and Art • ≈ monochrome ≈ • "LUMEN" ☀ Zauber des Lichtes ☼ Magic Light ✺ • O mundo em preto e branco - The world in black and white • PHLEARN • Black & White Horizon • The Pick • Flick Bar « less

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