Sc(OH)3 (s) → Sc+3 (aq) + 3 OH-1 (aq)

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Reaction Type:

Dissociation of an ionic compound in water

Enthalpy of Reaction

[1ΔHf(Sc+3 (aq)) + 3ΔHf(OH-1 (aq))] - [1ΔHf(Sc(OH)3 (s))]
[1(-614.21) + 3(-229.99)] - [1(-1363.57)] = 59.3899999999999 kJ
59.39 kJ     (endothermic)

Entropy Change

[1ΔSf(Sc+3 (aq)) + 3ΔSf(OH-1 (aq))] - [1ΔSf(Sc(OH)3 (s))]
[1(-255.22) + 3(-10.75)] - [1(100.42)] = -387.89 J/K
-387.89 J/K     (decrease in entropy)