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Why is a combustion reaction generally considered exothermic?

Answer and explanation

Correct answer: Because energy is released as heat and often as light

In combustion, a fuel reacts with oxygen to form products and releases energy to the surroundings as heat, often with light. Release of heat makes the reaction exothermic. Option B describes an endothermic reaction, in which heat is absorbed from the surroundings.

Related tags

ScienceClass10Chemical ReactionsCombustionExothermic ReactionsEnergy Changes

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