Question

CaCo3(s) gives rise to CaO(o) + CO2g^ as per the
equation, which of the following is not correct

A) Gas liberated
B) Exothermic reaction
C) Endothermic reaction
D) chemical decomposition reaction.​

Answer 1

Answer:

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Explanation:

B) Exothermic reaction is wrong

because

There are two ways for answering this question:

When delta H is a positive number, the reaction is endothermic, because the products of the reaction have more energy compared to the reactants, so the reaction has gained energy, making it endothermic.

This is a decomposition reaction. You have to supply heat to break calcium carbonate into calcium oxide and carbon dioxide. In any reaction when heat is supplied to carry out that reaction, the reaction would be endothermic.

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Answer 2

Answer:

B) Exothermic

Explanation:

It is a endothermic reaction qand not exothermic as heat is applied to calcium carbonate to break down..

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