Given the system at equilibrium:
2POCl3 (g) + energy 2PCl3 (g) + O2 (g)
Which changes occur when O2 (g) is added tothis system?
(1) The equilibrium shifts to the right and the concentration of PCl3 (g) increases.
(2) The equilibrium shifts to the right and the concentration of PCl3 (g) decreases.
(3) The equilibrium shifts to the left and the concentration of PCl3 (g) increases.
(4) The equilibrium shifts to the left and the concentration of PCl3 (g) decreases.
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