Question

What is the standard enthalpy change for the neutralization reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)? Express your answer in kilojoules per mole of HCl. (Assume that the reaction is in water and under standard conditions.)

Answer 1

The neutralization reaction between hydrochloric acid  HCl  and sodium hydroxide  NaOH  can be represented by the following balanced chemical equation:HCl aq  + NaOH aq   NaCl aq  + H2O l The standard enthalpy change for this reaction, also known as the heat of neutralization, is approximately -57.32 kJ/mol of HCl under standard conditions.