Enthalpy of sublimation

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. For elemental metals, it is also equal to the standard enthalpy of formation of the gaseous metal atoms.^[1] The heat of sublimation is usually expressed in kJ/mol, although the less customary kJ/kg is also encountered.

Sublimation enthalpies

symbol	substances	Sublimation enthalpy (kJ/mol)
Li	lithium	159[1]
Na	sodium	107[1]
K	potassium	89[1]
Rb	rubidium	81[1]
Cs	caesium	76[1]
Mg	magnesium	148[1]
Ca	calcium	178[1]
Sr	strontium	164[1]
Ba	barium	180[1]
Fe	iron	416[1]
Ni	nickel	430[1]
Cu	copper	338[1]
Zn	zinc	131[1]
Ag	silver	285[1]
W	tungsten	849[1]
Au	gold	366[1]
C	graphite	717[1]
C	diamond	715[1]
Si	silicon	456[1]
Sn	tin	302[1]
Pb	lead	195[1]
Fm	fermium	141[2]
I2	iodine	62.4[3]
C10H8	naphthalene	72.9[3]
CO2	carbon dioxide	25[3]
H2O	water	51.1

See also

• Heat
• Sublimation (chemistry)
• Phase transition
• Clausius-Clapeyron equation