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Enthalpy of atomization
The enthalpy of atomization (also standard enthalpy of atomisation - US spelling) is the enthalpy change that accompanies the total separation of all atoms in a chemical substance (either a chemical element or a chemical compound). This is often represented by the symbol ΔHat
Additional recommended knowledge
The enthalpy of atomization of gaseous H2O is, for example, the sum of the HO—H and H—O bond dissociation enthalpies. The enthalpy of atomization of an elemental solid is exactly the same as the enthalpy of sublimation for any elemental solid that becomes a monatomic gas upon evaporation.
There is a difference between a solid converting to a gas, and a diatomic gaseous element converting to gaseous atoms. The standard enthalpy is purely based on the production of one mole of gaseous atoms.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Enthalpy_of_atomization". A list of authors is available in Wikipedia.|