Consider the gas-phase equilibrium
N₂O₄(g) ⇌ 2 NO₂(g)
At 298 K, Kc = 4.0. A sealed 1.0 L flask at this temperature contains 10 N₂O₄ molecules and 12 NO₂ molecules.
Will the reaction proceed in the forward direction (toward NO₂) or in the reverse direction (toward N₂O₄) as the system moves toward equilibrium? Answer with “forward” or “reverse.”