Question

dissolution of CaO in water is ____ reaction.​

Answer 1

Answer:

The formation of slaked lime (calcium hydroxide, Ca(OH)2) when water is added to lime (CaO) is exothermic. CaO(s) + H2O (l) → Ca(OH)2(s) This reaction occurs when water is added to dry portland cement to make concrete, and heat evolution of energy as heat is evident because the mixture becomes warm.

Answer 2

It is an exothermic reaction.

It involves the release of a large quantity of heat energy.