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Which of the following equations represents an exothermic reaction?

Answer and explanation

Correct answer: CH₄ + 2O₂ → CO₂ + 2H₂O + heat

An exothermic reaction releases energy to the surroundings, and the released heat may be written among the products. In option C, methane burns in oxygen and produces carbon dioxide, water, and heat, so it is exothermic. Options A, B, and D require heat, electricity, or sunlight as energy input and represent endothermic processes.

Related tags

Chemical ReactionsExothermic ReactionsMethane CombustionChemical EquationsClass10 ScienceChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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