Dissociation of an ionic compound in water
Enthalpy of Reaction
[2ΔHf(Ag+1 (aq)) + 1ΔHf(CrO4-2 (aq))] - [1ΔHf(Ag2CrO4 (s))]
[2(105.58) + 1(-881.15)] - [1(-731.74)] = 61.75 kJ
61.75 kJ (endothermic)
Free Energy of Reaction (at 298.15 K)
From ΔGf° values:
[2ΔGf(Ag+1 (aq)) + 1ΔGf(CrO4-2 (aq))] - [1ΔGf(Ag2CrO4 (s))]
[2(77.12) + 1(-727.85)] - [1(-641.83)] = 68.22 kJ
68.22 kJ (nonspontaneous)
From ΔG = ΔH - TΔS:
68.31 kJ (nonspontaneous)
Equilibrium Constant, K (at 298.15 K)
This process is not favorable at 25°C.
Enter an initial concentration for the ionic compound. Upon hitting submit, Ksp (1.11611271994287E-12) will be used to calculate the equilibrium concentration for all species.