[单选题]
The following graph shows the Gibbs free energy agai w+ 6dnx5-.a,urhub zns/vy:q5 k/ndr nawjbyky ak;0 9+5 vc1a6. btsost the extent of reaction for a reversib 9abyj6w 0at 5 os.;y1akvbc+kle reaction.
At what point is the reaction at equilibrium?
A. 1
B. 2
C. 3
D. 4
参考答案: B
本题详细解析: At equilibrium, Gibbs free energy is at a minimum.
