For the reaction PCl
5 (g)

PCl
3 (g) + Cl
2 (g) ,
Kc = 0.0454 at 261 °C. If a vessel is filled with theses gases such that the initial concentrations are [PCl
5] = 0.2 M, [PCl
3] = 0.2 M, and [Cl
2] = 2.25 M, which of the following statements is TRUE?
◦ the reaction is at equilibrium
◦ the forward reaction is spontaneous
◦ the reverse reaction is spontaneous
◦ the forward reaction is exothermic
◦ the reverse reaction is exothermic