Q9 of 28 Page 77

Why are carbon and its compounds used as fuels for most applications ?

Carbon and its compounds are used as fuels because they give a lot of heat and light when burnt in air.

(i) When carbon is burned in air, it produces carbon dioxide gas and releases a lot of heat :



(ii) When a carbon compound methane is burned in air, it produces carbon dioxide and water vapour, and releases a lot of heat :



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