Exothermic

A term applied to thermal reactions, referring to one that releases energy. A classic example is burning. Most parts of the coffee roastingThe application of heat to green coffee seeds (beans) to create palatable material for brewing a great cup!: Coffee roasting is a chemical process induced by heat, by... process are endothermicA term applied to thermodynamic reactions, referring to one that absorbs heat. Most parts of the coffee roasting process are endothermic, as coffee acquires heat from the environment...., but first crackFirst crack in one of two distinct heat-induced pyrolytic reactions in coffee. It is distinguished by a cracking or popping sound in the coffee, and occurs between 390... is exothermic.