KBrO3 (s) → K+1 (aq) + BrO3-1 (aq)

Back to reactions list

 

Reaction Type:

Dissociation of an ionic compound in water

Enthalpy of Reaction

[1ΔHf(K+1 (aq)) + 1ΔHf(BrO3-1 (aq))] - [1ΔHf(KBrO3 (s))]
[1(-252.4) + 1(-83.68)] - [1(-332.21)] = -3.87000000000006 kJ
-3.87 kJ     (exothermic)

Entropy Change

[1ΔSf(K+1 (aq)) + 1ΔSf(BrO3-1 (aq))] - [1ΔSf(KBrO3 (s))]
[1(102.5) + 1(163.18)] - [1(149.16)] = 116.52 J/K
116.52 J/K     (increase in entropy)

Free Energy of Reaction (at 298.15 K)

From ΔGf° values:
[1ΔGf(K+1 (aq)) + 1ΔGf(BrO3-1 (aq))] - [1ΔGf(KBrO3 (s))]
[1(-283.3) + 1(1.67)] - [1(-243.51)] = -38.12 kJ
-38.12 kJ     (spontaneous)

From ΔG = ΔH - TΔS:
-38.61 kJ     (spontaneous)

Equilibrium Constant, K (at 298.15 K)

4772068.48040839
This process is favorable at 25°C.

Enter an initial concentration for the ionic compound. Upon hitting submit, Ksp (4772068.48040839) will be used to calculate the equilibrium concentration for all species.

KBrO3 K+1 BrO3-1
Initial M   0 0
Change -x +x +x
Equilibrium