Which event is an example of an exothermic reaction?

Question

a
melting ice
b
combustion
c
evaporation
d
decomposition

Answer 1

The correct answer is b) combustion.

Combustion is an exothermic reaction because it releases heat and light as a product of the reaction between a fuel and an oxidant, typically oxygen. In contrast, melting ice, evaporation, and decomposition generally involve the absorption of energy, making them endothermic processes.