In a Study of the System, Cl₂(g)+ Br₂(g) 2

In a study of the system, Cl₂(g) + Br₂(g) 2 BrCl(g) , at 350 K, several different reaction mixtures, described below, were prepared, placed in 5.00 liter containers, and allowed to attain equilibrium at 350 K. Despite having the 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: 0.100 moles of Cl₂, 0.000 moles of Br₂ and 0.600 moles of BrCl
B) System 2: 0.250 moles of Cl₂, 0.150 moles of Br₂ and 0.300 moles of BrCl
C) System 3: 0.400 moles of Cl₂, 0.300 moles of Br₂ and 0.000 moles of BrCl
D) System 4: 0.300 moles of Cl₂, 0.250 moles of Br₂ and 0.250 moles of BrCl
E) System 5: 0.350 moles of Cl₂, 0.250 moles of Br₂ and 0.100 moles of BrCl