A group of students working on chemistry homework calculates the equilibrium constants for three reactions.

Reaction 1 has ΔG° = −50 kJ, reaction 2 has ΔG° = −30 kJ, and reaction 3 has ΔG° = −10 kJ. The students are surprised when their answers for each reaction are very close to K = 1. Suggest what error the students must have made and calculate the actual values of K for these reactions.