Calculate kc for the reaction mgos cl2g mgcl2s o2g and

Question

At a certain temperature, Kc = 0.0500 and ?H = +39.6 kJ for the reaction below.

2MgCl2(s) + O2(g) ? 2MgO(s) + 2Cl2(g)

Calculate Kc for the reaction MgO(s) + Cl2(g) ? MgCl2(s) + O2(g) and indicate whether the value will be larger or smaller at a lower temperature.