give examples of reactions where heat is liberated.
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(i)C + O2 — CO2 + Heat
(ii)CaO + H2O — Ca(OH)2 + Heat
(ii)CaO + H2O — Ca(OH)2 + Heat
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CaO + H2O-----> Ca(OH)2+heat
Zn+HCl--->ZnCl2 +H2+ heat
Mg+O2--->MgO +heat
Na + H2O ----> NaOH +H2+ heat
Zn+HCl--->ZnCl2 +H2+ heat
Mg+O2--->MgO +heat
Na + H2O ----> NaOH +H2+ heat
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