Question

Hydrochloric acid reacts with sodium hydroxide to form sodium chloride and water. The heat of neutralisation of this reaction is

• A. –51 kJ/mol
• B. –57 kcal/mol
• C. –13.7 kcal/mol
• D. –13.7 kJ/mol

Answer 1

The correct option is C –13.7 kcal/mol

The reaction between an acid and a base to give salt and water is known as a neutralisation reaction. It is an exothermic reaction because 13.7 kcal/mol of heat is released in the reaction. Therefore, the heat of neutralisation of this reaction is –13.7 kcal/mol.

Hence, the correct answer is option (c).