Exothermic Reaction Chemistry Example 1

Solution

1. 1
   In an exothermic reaction, the energy released when new bonds form in the products is greater than the energy required to break bonds in the reactants.
2. 2
   The C–O and O–H bonds in $\text{CO}_2$ and $\text{H}_2\text{O}$ are very strong, releasing more energy than is needed to break the C–H and O=O bonds.
3. 3
   The excess energy is released as heat and light ($\Delta H < 0$).