Consider the following equations of a cell reaction:
A + B → C + D             ;     E° = x volt, ΔG = ΔG₁
2A + 2B → 2C + 2D     ;     E° = y volt, ΔG = ΔG₂
Then,
(1) x = y, ΔG₁ = ΔG₂
(2) x > y, ΔG₁ > ΔG₂
(3) x = y, ΔG₂ = 2ΔG₁
(4) x < y, 2ΔG₂ = ΔG₁