To calculate the standard enthalpy change H for the neutralization reaction between HCl and NaOH, we can use the following equation:H = Hf products - Hf reactants First, let's identify the standard enthalpy of formation Hf for the reactants:- HCl aq and NaOH aq are strong acids and bases, so their Hf values are considered to be zero.Now, let's plug the values into the equation:H = [ -407.3 kJ/mol + -285.8 kJ/mol ] - [ 0 kJ/mol + 0 kJ/mol ]H = -693.1 kJ/molThe standard enthalpy change H for the neutralization reaction between HCl and NaOH is -693.1 kJ/mol.