If you find that [CoCl42-(aq)] = 4.431 M, [Co(H2O)62+(aq)] = 0.172 M, and [Cl-(aq)] = 0.757 M at 7 ∘C, what is value of...
If you find that [CoCl42-(aq)] = 4.431 M, [Co(H2O)62+(aq)] = 0.172 M, and [Cl-(aq)] = 0.757 M at 7 ∘C, what is value of ΔG at 7 ∘C, in kJ/mol?
Homework Answers
The expression for the equilibrium constant (K) can be written as follows.
K = [CoCl42-(aq)]/[Co(H2O)62+(aq)][Cl-(aq)]4
i.e. K = 4.431/(0.172*0.7574) = 78.45
Now, G = -RTln(K)
i.e. G =
-8.314*10-3 kJ/mol.K * (7+273) K * ln(78.45)
Therefore, G =
-10.155 kJ/mol
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