exothermally
/ˌɛksoʊˈθɜːrməli/
adverb
- In a way that releases heat, especially during a chemical reaction.
- The reaction proceeded exothermally, warming the beaker noticeably.
- When the acid mixed with water, it reacted exothermally and the container became hot.
- The combustion of natural gas occurs exothermally, producing both heat and light.