For the reaction PCl
3(g) + Cl
2(g)

PCl
5(g) at a particular temperature, K
c = 24.3. Suppose a system at that temperature is prepared with [PCl
3] = 0.10 M, [Cl
2] = 0.15 M, and [PCl
5] = 0.60 M. Which of the following is true based on the above?
◦ Q
c> K
c, the reaction proceeds from left to right to reach equilibrium
◦ Q
c> K
c, the reaction proceeds from right to left to reach equilibrium
◦ Q
c< K
c, the reaction proceeds from left to right to reach equilibrium
◦ Q
c< K
c, the reaction proceeds from right to left to reach equilibrium
◦ Q
c = K
c, the reaction is currently at equilibrium