Imagine that for the unimolecular reaction A 
⟺
B, the value of 
ΔG° is -1.17
kcal/mol. If equimolar initial amounts of A and B react at 25 °C,
what fraction of the molecules will be B molecules once the system
has come to equilibrium?
Homework Answers
ΔG° = -1.17 kcal/mol
ΔG° = - R T ln K
- 1.17 x 10^3 = - 1.987 x 298 x ln K
Keq = 7.214
fraction of B molecules = Keq / Keq + 1
= 7.214 / 7.214 + 1
fraction of B = 0.88
= 88 %
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Imagine that for the unimolecular reaction A ⟺
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imagine that for the unimolecular reaction A ⟺ B, the value of Δ G° is -0.89 kcal/mol. If equimolar initial amounts of A and B react at 25 °C, what fraction of the molecules will be B molecules once the system has come to equilibrium? Report your answer as a percent to the nearest ones.
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