Answer to Question #105962 in Inorganic Chemistry for Faiza

Question

Explain why the enthalpy of neutralization of Hcl and KOH is similar to that of HNO3 and KOH but higher than that of Hcl and NH3

Answer 1

Because in case of HCl + KOH and HNO₃ + KOH the following reaction occures:

H⁺ + OH^- $\to$ H₂O

In case of NH₃ + HCl the reaction is different:

H⁺ + NH₃ $\to$ NH₄⁺