If a reaction has both positive enthalpy change (ΔH) and positive entropy change (ΔS), what can be said about the spontaneity of the reaction?

Explanation

When both ΔH and ΔS are positive, the spontaneity of the reaction depends on temperature; however, without temperature information, the reaction is generally considered non-spontaneous at standard conditions. Therefore, the correct conclusion is that the reaction is non-spontaneous.