In a Study of the System, N₂O₄(g) 2 NO₂(g)

In a study of the system, N₂O₄(g) 2 NO₂(g) , at 585 K, several different reaction mixtures, described below, were prepared, placed in 5.00 liter containers, and allowed to attain equilibrium at 480 K. Despite having different starting compositions shown, four of the five mixtures had the identical composition at equilibrium. Which one of the systems attained a different equilibrium composition than the others?

A) System 1: 0.400 moles of N₂O₄ and 0.800 moles of NO₂
B) System 2: 0.300 moles of N₂O₄ and 1.000 moles of NO₂
C) System 3: 0.800 moles of N₂O₄ and 0.000 moles of NO₂
D) System 4: 0.600 moles of N₂O₄ and 0.400 moles of NO₂
E) System 5: 0.400 moles of N₂O₄ and 0.700 moles of NO₂