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03/10/2021 11:34 am
Topic starter
For the auto-ionization of water at 25°C,
H2O(l) ⇌ H+(aq) + OH-(aq)
equilibrium constant is 10-14. What is ΔG° for the process?
(a) ≃8 × 104 J mol-1
(b) ≃3.5 × 104 J mol-1
(c) ≃2 × 104 J mol-1
(d) None of these
1 Answer
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03/10/2021 11:37 am
Correct answer: (a) ≃8 × 104 J mol-1
Explanation:
ΔG° = -RT lnK
= -8.314JK-1mol-1 × 298 K × 2.303 log 10-14
= 7.98 × 104 ≃ 8 × 104 J mol-1