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CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics
Problem Calculate heat of formation of K O H ( s ) KOH(s) K O H ( s ) K ( s ) + H 2 O ( l ) + a q . ⟶ K O H ( a q . ) + 1 2 H 2 ( g ) ; Δ H = − 48.0 kcal … ( 1 ) K(s) + H_2O(l) + aq. \longrightarrow KOH(aq.) + \frac{1}{2}H_2(g); \quad \Delta H = -48.0 \text{ kcal} \quad \dots(1) K ( s ) + H 2 O ( l ) + a q . ⟶ K O H ( a q . ) + 2 1 H 2 ( g ) ; Δ H = − 48.0 kcal … ( 1 ) H 2 ( g ) + 1 2 O 2 ( g ) ⟶ H 2 O ( l ) ; Δ H = − 68.4 kcal … ( 2 ) H_2(g) + \frac{1}{2}O_2(g) \longrightarrow H_2O(l); \quad \Delta H = -68.4 \text{ kcal} \quad \dots(2) H 2 ( g ) + 2 1 O 2 ( g ) ⟶ H 2 O ( l ) ; Δ H = − 68.4 kcal … ( 2 ) K O H ( s ) + a q . ⟶ K O H ( a q . ) ; Δ H = − 14.0 kcal … ( 3 ) KOH(s) + aq. \longrightarrow KOH(aq.); \quad \Delta H = -14.0 \text{ kcal} \quad \dots(3) K O H ( s ) + a q . ⟶ K O H ( a q . ) ; Δ H = − 14.0 kcal … ( 3 ) Browse the problem library