What is meant by combustion? Explain it by giving an example. - Vidyadip

Question

What is meant by combustion? Explain it by giving an example.

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Answer

Combustion is a reaction in which a substance is heated in presence of air or oxygen.
During this reaction, carbon present in all allotropic forms undergoes combustion in air to produce carbon dioxide with release of heat and light.
$\mathrm{C}+\mathrm{O}_2 \rightarrow \mathrm{CO}_2+$ Heat and Light

Carbon Oxygen Carbondioxide

Almost all carbon compounds also release a large amount of heat and light on burning.
These are one kind of oxidation reactions.
For example,
$\mathrm{CH}_4+2 \mathrm{O}_2-\mathrm{CO}_2+2 \mathrm{H}_2 \mathrm{O}+$ Heat and Light

Methane Oxygen Carbon Water
dioxide

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}+3 \mathrm{O}_2 \rightarrow 2 \mathrm{CO}_2+3 \mathrm{H}_2 \mathrm{O}+$ Heat and Light

Ethanol Oxygen Carbon Water
dioxide

Saturated hydrocarbons will generally give a clean flame, while unsaturated hydrocarbons give a yellow flame with a release of black smoke.

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