Citation:
An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction.
A chemical process that absorbs energy from its surroundings in the form of heat.
The study of energy changes in physical or chemical processes.
Heat of Reaction: The change in enthalpy during a chemical reaction, which can be either absorbed (endothermic) or released (exothermic).