The correct option is a
In a neutralization reaction, an acid and a base react to form salt and water. Also, it's important to understand that during an exothermic reaction, bonds are being made and energy is released to the surroundings.
- When a reaction is endothermic - Bonds are broken and energy is absorbed from the surroundings.
- In our example of HCl + NaOH - this is a neutralization reaction to form NaCl + H2O.
- Basically there is more bond making than bond breaking in this reaction so the Delta H is negative - it is more exothermic.
