NaOH(aq) + HCl(aq) = NaCl(aq) + H₂O(l) এর ΔH হলো-

ব্যাখ্যা

NaOH+HCl→NaCl+H₂O; ΔH = −57.3kJ। 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O; ΔH = −57.3×2 = −114.6kJ। CH₃COOH+NaOH→CH₃COONa+H₂O; ΔH = −55.2kJ। HF + NaOH → NaF + H₂O; ΔH = −68kJ