If an equilibrium reaction has ΔH > 0, the reaction will proceed favourably in the forward direction at

If an equilibrium reaction has a positive enthalpy change (ΔH > 0), it means that the forward reaction is endothermic, which requires an input of energy to proceed. At a low temperature, the reaction rate will be slower, and less energy will be available to drive the reaction in the forward direction. Therefore, the reaction will proceed more favorably in the forward direction at a high temperature, where there is more thermal energy available to drive the endothermic reaction. So, the answer is "High temperature."