What is Sublimation ( full explanation) ???
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Answer:
THE PROCESS IN WHICH THE SOLID IS DIRECTLY CHANGED INTO A GAS IS CALLED
SUBLIMATION
Sublimation Definition
Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point.
The term "sublimation" only applies to physical changes of state and not to the transformation of a solid into a gas during a chemical reaction. For example, when candle wax undergoes combustion, the paraffin is vaporized and reacts with oxygen to produce carbon dioxide and water. This is not sublimation.
The opposite process of sublimation—where a gas undergoes a phase change into solid form—is called deposition or desublimation.
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Sublimation Definition (Phase Transition in Chemistry)
Sublimation Definition and Examples
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Solid carbon dioxide
This chunk of solid carbon dioxide or dry is sublimating from a solid directly into a gas. Matt Meadows / Getty Images
By Anne Marie Helmenstine, Ph.D.
Updated January 09, 2020
Sublimation Definition
Sublimation is the transition from the solid phase to the gas phase without passing through an intermediate liquid phase. This endothermic phase transition occurs at temperatures and pressures below the triple point.
The term "sublimation" only applies to physical changes of state and not to the transformation of a solid into a gas during a chemical reaction. For example, when candle wax undergoes combustion, the paraffin is vaporized and reacts with oxygen to produce carbon dioxide and water. This is not sublimation.
The opposite process of sublimation—where a gas undergoes a phase change into solid form—is called deposition or desublimation.
Sublimation Examples
Dry ice is solid carbon dioxide. At room temperature and pressure, it sublimates into carbon dioxide vapor.
Freezer burn results from the sublimation of ice into water vapor.
At the right temperature, the elements iodine and arsenic will sublimate from solid form into gaseous form.
Naphthalene, a chemical commonly used in mothballs, readily sublimates at room temperature and pressure.
Water ice will sublimate, although more slowly than dry ice. The effect can be seen over snowfields when the sun is out but the temperature is cold.
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