Question

Which of the following is an exothermic reaction a heating calcium carbonate B adding water to calcium oxide?

Answer 1

ANSWER IS OPTION B

Adding water to calcium oxide is an exothermic reaction because a large amount of heat is released during this reaction

CaO + H2O-------------> Ca(OH)2 + Energy(Heat)

(optional)

OPTION A IS NOT ANSWER BECAUSE

we are providing heat for the reaction and giving energy for reaction in any form is called an endothermic reaction