Calcium carbonate + heat Calcium oxide + Carbon dioxide Calcium oxide + water Calcium hydroxide + heat a. Mention the reactants and products in each case. b. Which among these is endothermic? c. Which one is exothermic?
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Answer:
calcium carbonate + heat
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Explanation:
Exothermic = Reactions that give heat
ENDOTHERMIC = Reactions that need heat
Reactants: (i)Calcium carbonate(CaCo3) + (heat)
(ii)Calcium oxide, Water (H2O)
Products: (i)Calcium oxide(Cao), Carbon Dioxide(Co2)
(ii) calcium hydroxide +(Heat)
ENDOTHERMIC= SINCE (i) REQUIRES HEAT FOR REACTION SO IT IS ENDOTHERMIC
EXOTHERMIC= SINCE IT GIVE AWAY HEAT SO IT IS EXOTHERMIC
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