noun
heat of sublimation
Technical term in physics and chemistry for the energy required to change a solid directly into a gas.
昇華熱は、固体が直接気体になるときに必要なエネルギーです。
The heat of sublimation is the energy required when a solid turns directly into a gas.
融解熱 is the heat of fusion (solid to liquid), whereas 昇華熱 is for solid to gas.
Compound of 昇華 (sublimation) and 熱 (heat). The exact historical derivation is uncertain, but the term follows standard scientific naming conventions.