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Dark green crystals of nickelocene, sublimed and freshly deposited on a cold finger Sublimation of iodine. 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]
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 February 2025. This article is about the chemical element. For other uses, see Iodine (disambiguation). Chemical element with atomic number 53 (I) Iodine, 53 I Iodine Pronunciation / ˈ aɪ ə d aɪ n, - d ɪ n, - d iː n / (EYE -ə-dyne, -din, -deen) Appearance lustrous metallic gray solid ...
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.
Another version involves filling the device with a cold material (examples: ice, dry ice or a mixture such as dry ice/acetone or ice/water). [ 1 ] Typically a cold finger is used in a sublimation apparatus , [ 2 ] or can be used as a compact version of a condenser in either reflux reaction or distillation apparatus.
A Facebook claim contains three TikTok videos that allegedly show that snow is synthetic. We rated it false. Fact check: Sublimation, not government conspiracy, explains snowmelt videos
Compounds with iodine in formal oxidation state −1 are called iodides. In everyday life, iodide is most commonly encountered as a component of iodized salt , which many governments mandate. Worldwide, iodine deficiency affects two billion people and is the leading preventable cause of intellectual disability .
Used to prevent iodine deficiency, this salt is one of the major uses of the element iodine. [1] The United States Food and Drug Administration suggests a limit of intake to 50 mg/head/day. [ 2 ] Although EDDI is generally recognized as safe (GRAS) only as a nutrient source of iodine, administration of EDDI also has preventative effects on foot ...
Copper(I) iodide can be prepared by heating iodine and copper in concentrated hydroiodic acid. [9] In the laboratory however, copper(I) iodide is prepared by simply mixing an aqueous solution of potassium iodide and a soluble copper(II) salt such as copper(II) sulfate. [4] 2 Cu 2+ + 4 I − → 2 CuI + I 2