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The term sublimation refers specifically to a physical change of state and is not used to describe the transformation of a solid to a gas in a chemical reaction. For example, the dissociation on heating of solid ammonium chloride into hydrogen chloride and ammonia is not sublimation but a chemical reaction.
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.
Mercury(II) chloride (or mercury bichloride [citation needed], mercury dichloride), historically also known as sulema or corrosive sublimate, [2] is the inorganic chemical compound of mercury and chlorine with the formula HgCl 2, used as a laboratory reagent.
Monatomic chlorine Gas Cl 121.7 Chloride ion Aqueous Cl −: −167.2 Chlorine: Gas Cl 2: 0 Chromium: Solid Cr 0 Copper: Solid Cu 0 Copper(II) bromide: Solid CuBr2 −138.490 Copper(II) chloride: Solid CuCl2 −217.986 Copper(II) oxide: Solid CuO −155.2 Copper(II) sulfate: Aqueous CuSO 4: −769.98 Fluorine: Gas F 2: 0 Monatomic hydrogen Gas ...
Conditions are so chosen that the solid volatilizes and condenses as a purified compound on a cooled surface, leaving the non-volatile residual impurities or solid products behind. The form of the cooled surface often is a so-called cold finger which for very low-temperature sublimation may actually be cryogenically cooled.
Antimony metal is oxidized to antimony(III) oxide in furnaces. The reaction is exothermic. Antimony(III) oxide is formed through sublimation and recovered in bag filters. The size of the formed particles is controlled by process conditions in furnace and gas flow. The reaction can be schematically described by: 4 Sb + 3 O 2 → 2 Sb 2 O 3
The α-form of PdCl 2 is a polymer, consisting of "infinite" slabs or chains. The β-form of PdCl 2 is molecular, consisting of an octahedral cluster of six Pd atoms. Each of the twelve edges of this octahedron is spanned by Cl −. PtCl 2 adopts similar structures, whereas NiCl 2 adopts the CdCl 2 motif, featuring hexacoordinated Ni(II). [1]
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. This ...