Question

What is usually released in a combustion reaction?. . A. energy. . B. elemental oxygen. . C. a carbon-based fuel. . D. elemental carbon.

Answer 1

A) energy

Step-by-step explanation:

All combustion reactions are exothermic. This means that it releases energy when it happens, and that energy comes from the rupture of bonds between carbon atoms.

Also, carbon-based fuel and oxygen are usually the reactant of the combustion and carbon is always released as an oxide.

Answer 2

The correct answer to your questions is A. In a combustion reaction, energy is usually released. Combustion reaction is an exothermic reaction which usually releases energy in the form of heat.