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Enthalpy of sublimation. In thermodynamics, the enthalpy of sublimation, or heat of sublimation, is the heat required to sublimate (change from solid to gas) one mole of a substance at a given combination of temperature and pressure, usually standard temperature and pressure (STP). It is equal to the cohesive energy of the solid.
Its construction and principle of operation is simple. It consists of a titanium filament through which a high current (typically around 40 A) is passed periodically. This current causes the filament to reach the sublimation temperature of titanium, and hence the surrounding chamber walls become coated with a thin film of clean titanium.
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. [ 1 ] The verb form of sublimation is sublime, or less preferably, sublimate. [ 2 ]Sublimate also refers to the product obtained by sublimation. [ 2 ][ 3 ] The point at which sublimation occurs rapidly (for further ...
Sublimatory. Simple sublimation apparatus. Water usually cold, is circulated in cold finger to allow the desired compound to be deposited. 1 Cooling water in 2 Cooling water out 3 Vacuum/gas line 4 Sublimation chamber 5 Sublimed compound 6 Crude material 7 External heating. A sublimatory [1] [2] or sublimation apparatus is equipment, commonly ...
"Meteorite impacts generate high temperatures ranging from 2,000-6,000 degrees Celsius (3,600-10,800 degrees Fahrenheit). These extreme temperatures melt and vaporize rocks on the lunar surface ...
e. Dye-sublimation printing (or dye-sub printing) is a term that covers several distinct digital computer printing techniques that involve using heat to transfer dye onto a substrate. The sublimation name was first applied because the dye was thought to make the transition between the solid and gas states without going through a liquid stage.
The sublimation sandwich method (also called the sublimation sandwich process and the sublimation sandwich technique) is a kind of physical vapor deposition used for creating man-made crystals. Silicon carbide is the most common crystal grown this way, though other crystals may also be created with it (notably gallium nitride ).
Those who remained diabetes-free for at least 4 years had a 26% lower risk of all-cause mortality and a 40% lower risk of vascular problems. Participants who remained free of diabetes for at least ...