# How can an exothermic reaction be identified?

Jul 20, 2018

If energy (i.e. heat) is released upon completion of the reaction

#### Explanation:

Exothermic reactions release energy. When you burn ethyl alcohol (i.e.):

${C}_{2} {H}_{5} O H + 3 {O}_{2} \to 2 C {O}_{2} + 3 {H}_{2} O + E$

energy ($E$) is released. Calorimeters measure this energy.