Question

Which event is an example of an exothermic reaction?

decomposition
melting ice
combustion
evaporation

Answer 1

An example of an exothermic reaction is **combustion**. In combustion, substances react with oxygen and release energy in the form of heat and light, signifying an exothermic process. The other options—decomposition, melting ice, and evaporation—are endothermic processes, as they require the absorption of energy.