Feasible Reaction Temperature Thermodynamics

The reaction,
MgO(s) + C(s)®Mg(S) + CO(g), for which ΔrH° = + 491.1 kJ mol–1 and ΔrS° = 198.0 JK–1mol–1, is not feasible at 298 K. Temperature above which reaction will be feasible is :-