Write a formulae equation to represent the combustion of carbon to form carbon dioxide and the thermal decomposition of magnesium carbonate

Explanation:

Balanced equation to represent the combustion of carbon to form carbon dioxide;

C (s) + O₂ (g) → CO₂ (g)

Balanced equation to represent the thermal decomposition of magnesium carbonate

MgCO₃ (s) → MgO (s) + CO₂ (g)

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.