Distinguish between an exothermic and an endothermic reaction. Amongst the following reactions, identify the exothermic reaction andthe endothermic reaction.
(i) Heating coal in air to form carbon dioxide.(ii) Heating limestone in a lime kiln to formquicklime

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Solution

Endothermic reaction- a reaction which requires/absorbs heat from the surroundings to proceed is called endothermic reaction.
Exothermic reaction - a reaction which releases heat to the surroundings is called endothermic reaction.
(i)Heating coal in air to form carbon dioxide is an exothermic reaction
C + O₂â†’ CO₂ + heat
(ii) Heating limestone in a lime kiln to form quicklime is an endothermic reaction
CaCO₃ + heat â†’ CaO + CO₂

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Distinguish between an exothermic and an endothermic reaction. Amongst the following reactions, identify the exothermic reaction andthe endothermic reaction.(i) Heating coal in air to form carbon dioxide.(ii) Heating limestone in a lime kiln to formquicklime

Distinguish between an exothermic and an endothermic reaction. Amongst the following reactions, identify the exothermic reaction andthe endothermic reaction.
(i) Heating coal in air to form carbon dioxide.(ii) Heating limestone in a lime kiln to formquicklime