Calculate Δ r H ∘ (in kJ/mol) of the reaction in which 1 L, 1 M aqueous solution of NH 4 Cl is hydrolyzed completely. Given that: Δ H a q ⊕ + O H a q ⊖ → H 2 O ( ℓ ) Δ r H ∘ = − 57 k J / m

Question

Calculate Δ r ​ H ∘ (in kJ/mol) of the reaction in which 1 L, 1 M aqueous solution of NH 4 ​ Cl is hydrolyzed completely. Given that: Δ H a q ⊕ ​ + O H a q ⊖ ​ → H 2 ​ O ( ℓ ) Δ r ​ H ∘ = − 57 k J / m o l Standard ionization enthalpy of N H 4 ​ OH ( a q ) is 7 kJ/mol.

TestHub · Accepted Answer

NH 4 ​ OH aq ​ → NH 4 aq ⊕ ​ + OH aq ⊖ ​ Δ r ​ H ∘ = 7 KJ / mol ​ H aq ⊕ ​ + OH aq ⊖ ​ → H 2 ​ O ( ℓ ) Δ r ​ H ∘ = − 57 KJ / mol NH 4 ​ OH + H + aq. ​ → NH 4 aq ​ ⊕ ​ + H 2 ​ O Δ r ​ H ∘ = − 50 KJ / mol 50 KJ / mol ​

Chemistry - Thermochemistry Question with Solution | TestHub

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