First slide

Enthalpy of neutralization

Question

Given that the data for neutralization of a weak acid (HA) and strong acid with a strong base is :
HA + OH^- → A^- + H₂O; ΔH = - 41.80kJ
H⁺ + OH^- → H₂O; ΔH = - 55.90kJ
The enthalpy of dissociation of weak acid would be

Moderate

Solution

ΔH_n = Δ_dH + (-55.9 KJ)
Δ_dH = -41.8+55.9
= 14.1 KJ
Where Δ_dH = Enthalpy of dissociation (or) Ionization of weak electrolyte

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