ΔG° when K = 1
At 298 K, a reaction has an equilibrium constant K = 1. What is ΔG°?
Answer D: explanation for every choice
A
Negative ΔG° corresponds to K greater than 1.
B
Positive ΔG° corresponds to K less than 1.
C
K already determines ΔG° at a given temperature.
D
Correct. ΔG° = −RT ln K, and ln 1 = 0.
TakeawayΔG° = −RT ln K. K above 1 → negative ΔG°.
Equation usedFree energy and the equilibrium constant
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