Question

How would you describe the following chemical reaction?

2CO(g)+O2(g) --> 2CO2(g) + energy

(a)exothermic
(b) endothermic

Answer 1

B

Step-by-step explanation:

The normal way to express an energy reaction is to put the energy on the left. Then you can make a rule.

• If the energy on the left is plus then the reactants require energy. The reaction is endothermic -- energy is taken from the environment.
• If the energy is minus when it is on the left. then the reactants give up energy. The reaction is exothermic and energy is given to the environment.

2CO(g)+O2(g) - energy --> 2CO2(g)

Exothermic