Why are decomposition reactions called the opposite of combination reactions? Write equations for these reactions.
Decomposition reactions are those in which a compound breaks down to form two or more substances. These reactions require a source of energy to proceed. Thus, they are the exact opposite of combination reactions in which two or more substances combine to give a new substance with the release of energy. For Example: Decomposition Reaction: CaCo3(s)-(Heat) - CaO(s)+Co2 (G) Combination Reaction: CaO (s) + H2O (l) → Ca(OH)2 (aq)
