Combustion reactions

Combustion reactions occur when a substance, typically a fuel like wood or gasoline, reacts rapidly with oxygen. This process releases energy in the form of heat and light, often seen as fire or flames. During combustion, the fuel's molecules break down and combine with oxygen, producing new substances such as carbon dioxide and water. This reaction requires a source of heat to start—called activation energy—and is common in everyday activities like heating, cooking, and engines. Proper control of combustion ensures efficient energy use and safety, while incomplete combustion can produce pollutants like carbon monoxide.