Enthalpy of sublimation

(thermodynamics) The increase in enthalpy accompanying the conversion of 1 mole, or unit mass, of a solid to a vapor at constant pressure and temperature. Also known as latent heat of sublimation.

The noun has one meaning:

Meaning #1: heat absorbed by a unit mass of material when it changes from a solid to a gaseous state

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The enthalpy of sublimation, or heat of sublimation, is defined as the heat required to sublime one mole of the substance at a given combination of temperature and pressure, usually standard temperature and pressure (STP). The heat of sublimation is usually expressed in kJ/mol, although the less customary kJ/kg is also encountered.

The standard enthalpy of sublimation for a material is equivalent to the sum of its standard enthalpy of fusion and its standard enthalpy of vaporization.

See also

• Heat
• Sublimation (chemistry)
• Phase change

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