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A sublimatory [1] [2] or sublimation apparatus is equipment, commonly laboratory glassware, for purification of compounds by selective sublimation. In principle, the operation resembles purification by distillation , except that the products do not pass through a liquid phase .
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.
where is a function of the temperature T and a typical wood dimension L and has units of time. The typical wood dimension is roughly the smallest value of (,, /) which are the radial, tangential and longitudinal dimensions respectively, in inches, with the longitudinal dimension divided by ten because water diffuses about 10 times more rapidly ...
Solid carbon dioxide sublimes rapidly along the solid-gas boundary (sublimation point) below the triple point (e.g., at the temperature of −78.5 °C, at atmospheric pressure), whereas its melting into liquid CO 2 can occur along the solid-liquid boundary (melting point) at pressures and temperatures above the triple point (i.e., 5.1 atm, − ...
Putting a lid on the frying pan keeps the water in, and some of it re-condenses, keeping the temperature too cool to brown for longer time. Pyrolysis of food can also be undesirable, as in the charring of burnt food (at temperatures too low for the oxidative combustion of carbon to produce flames and burn the food to ash ).
It’s the key to soft, chewy, and flavorful cookies.
The most common dyes used for sublimation activate at 350 degrees Fahrenheit / 175 degrees Celsius. However, a range of 380 to 420 degrees Fahrenheit / 195 to 215 degrees Celsius is normally recommended for optimal color. The result of the sublimation transfer process is a nearly permanent, high-resolution, full-color print.
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related to: aluminum sublimation temperature and time for wood stove cleaning products