Question

Give two e.g. of reactions where heat is liberated

Answer 1

HEYA!!
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♠ A Reaction in Which Heat is Released / Liberated is called Exothermic Reaction .

♠Examples are Digestion , Respiration as these involve the release of energy .

♠Talking about Chemical Reaction , some example are :-

Cao + H20 ------------------- Ca(OH)2 + Heat ⬆


CH4 + O2-------------------CO2 + H2O + Heat ⬆


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Answer 2

1.C+O2=CO2+heat energy

2.CaO+H2O=Ca(OH)2+heat energy