For the reaction H₂(g) + I₂(g) 34 ⇌ HI(g), consider two possibilities using the same-sized, rigid container:

(a) You add 0.5 mole of each reactant, allow the system to come to equilibrium, then add another mole of H₂, and allow the system to reach equilibrium again, or 

(b) You add 1.5 moles of H₂ and 0.5 mole of I₂ and allow the system to come to equilibrium. Will the final equilibrium mixture be different for the two procedures? Explain.