heat of condensation; condensation heat
Technical term in physics and meteorology; the heat released when a gas condenses into a liquid. The English gloss 'heat of evaporation' is likely a mistake for 'heat of condensation' or refers to the reverse process.
When water vapor turns into water droplets, heat of condensation is released.
気化熱 is the heat absorbed when a liquid vaporizes; similar to 蒸発熱 but broader. 凝結熱 is the opposite process.
Compound of 凝結 (gyōketsu, 'condensation') and 熱 (netsu, 'heat').