Identify the endothermic and exothermic reaction: CaCO3(s) → CaO(s) + CO2 (on heating)
Identify the endothermic and exothermic reaction.
\(\mathrm{CaCO_3(s) \xrightarrow{\Delta} CaO(s) + CO_2\uparrow}\)
1 answer
Endothermic reaction.
Calcium carbonate (limestone) decomposes into calcium oxide and carbon dioxide only when it is strongly heated (\(\Delta\) above the arrow). Heat is absorbed during the reaction, so it is endothermic. It is an example of thermal decomposition.
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· 24 Oct 2026
AI-verified · Oct 2026
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