NCERT Exercise Q9 (Textbook) - Chemical Reactions and Equations
Question: What does one mean by exothermic and endothermic reactions? Give examples.
Answer: Exothermic reactions release heat to surroundings (e.g., burning, respiration, CaO + H2O → Ca(OH)2 + Heat). Endothermic reactions absorb energy (e.g., decomposition of limestone CaCO3 → CaO + CO2, ...
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