Question

What is a chemical reaction in which heat is released as a product called?

Answer 1

This is called `"an exothermic reaction"`

Explanation:

Any reaction in which energy can be treated as a product is termed `"exothermic:"`

`CH_4(g) + 2O_2 rarr CO_2(g) + 2H_2O(l) + Delta`

On the other hand, where energy appears as a reactant, the reaction is termed `"endothermic":`

`NaCl(s) + Delta rarr Na^(+)(aq) + Cl^(-)(aq)`