noun
heat of evaporation; evaporation heat
Scientific term for the thermal energy required to change a liquid into vapor at a given temperature.
水の蒸発熱は約40.8 kJ/molです。
The heat of evaporation of water is about 40.8 kJ/mol.
気化熱 is a broader term for heat of vaporization, while 蒸発熱 specifically refers to evaporation from the liquid surface below the boiling point.
Compound of 蒸発 (evaporation) and 熱 (heat).