Chapter 8, Problem 8.85E

Which sentence best describes the following reaction?

${\text{2H}}_{\text{2}}\left(\text{g}\right)+{\text{O}}_{\text{2}}\left(\text{g}\right)\to {\text{2H}}_{\text{2}}\text{O}\left(l\right)+\text{heat}$

a. It is an endothermic reaction.

b. It is an exothermic double-replacement reaction.

c. It is a synthesis reaction that is also exothermic.

d. It is a decomposition reaction that is also endothermic.