Question

Write the balanced chemical equations for the decomposition of solid calcium hydroxide into solid calcium (ii) oxide (lime) and water vapor. express your answer as a balanced chemical equation. identify all of the phases in your answer.

Answer 1

Calcium oxide (CaO) or lime in solid form can be prepared from the decomposition of calcium hydroxide {Ca$(OH)_{2}$ in to lime (CaO) and water ($H_{2}O$ at high temperature. The reaction is an endothermic reaction. That is heat is absorbed in this reaction process. One mole of calcium hydroxide decomposed into one mole of calcium oxide and one mole of water. The balanced reaction can be shown as-CaC$O_{3}$ (solid) → CaO (solid) + $H_{2}O$ (liquid). The heat of the reaction is (+) 63.7 kJ/mole of CaO.