Enthalpy of neutralisation of HCl by NaOH is -55.84kJ/mol and by NH4OH is -51.34kJ/mol . The enthalpy of ionization of NH4OH is:-

Question

Enthalpy of neutralisation of HCl by NaOH is -55.84kJ/mol and by NH4OH is -51.34kJ/mol . The enthalpy of ionization of NH4OH is:- (A) 107.18kJ/mol (B) 4.5kJ/mol (C) -4.5kJ/mol (D) 3.5kJ/mol

Tardigrade Admin · Accepted Answer

ΔHion:|ΔHstrong|-|ΔHweak| =55.84-51.34 =4.5kJ/mol

Q. Enthalpy of neutralisation of $H Cl$ by $N a O H$ is $- 55.84 k J / m o l$ and by $N H_{4} O H$ is $- 51.34 k J / m o l$ . The enthalpy of ionization of $N H_{4} O H$ is:-

$107.18 k J / m o l$

$4.5 k J / m o l$

$- 4.5 k J / m o l$

$3.5 k J / m o l$

$Δ H i o n : ∣ Δ H_{s t ro n g} ∣ - ∣ Δ H_{w e ak} ∣$
$= 55.84 - 51.34$
$= 4.5 k J / m o l$

Q. Enthalpy of neutralisation of HCl by NaOH is −55.84kJ/mol and by NH4​OH is −51.34kJ/mol . The enthalpy of ionization of NH4​OH is:-

107.18kJ/mol

4.5kJ/mol

−4.5kJ/mol

3.5kJ/mol