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Calculate for chloride ion from the following data : (Roorkhee 1992)
CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem Calculate Δ H f ∘ \Delta H_f^\circ Δ H f ∘ for chloride ion from the following data :
1 2 H 2 ( g ) + 1 2 C l 2 ( g ) ⟶ H C l ( g ) ; Δ H f ∘ = − 92.4 kJ \frac{1}{2}H_2(g) + \frac{1}{2}Cl_2(g) \longrightarrow HCl(g); \quad \Delta H_f^\circ = -92.4 \text{ kJ} 2 1 H 2 ( g ) + 2 1 C l 2 ( g ) ⟶ H C l ( g ) ; Δ H f ∘ = − 92.4 kJ
H C l ( g ) + n H 2 O ⟶ H + ( a q . ) + C l − ( a q . ) ; Δ H f ∘ = − 748 kJ HCl(g) + nH_2O \longrightarrow H^+(aq.) + Cl^-(aq.); \quad \Delta H_f^\circ = -748 \text{ kJ} H C l ( g ) + n H 2 O ⟶ H + ( a q . ) + C l − ( a q . ) ; Δ H f ∘ = − 748 kJ
Δ H f ∘ H + ( a q . ) = 0.0 kJ \Delta H_f^\circ H^+(aq.) = 0.0 \text{ kJ} Δ H f ∘ H + ( a q . ) = 0.0 kJ (Roorkhee 1992)
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