Equations Associated with Enthalpies of Formation

If the heat of formation of H2O(l) is -286 kJ/mol, which of the following thermochemical equations for the formation of H2O is correct?

If the heat of formation of is -286 , which of the following thermochemical equations for the formation of is correct?

H2(g) + O(g) → H2O(g) ΔH=-286 kJ
H2O(l) → H2(g) + 12 O2(g) ΔH=286 kJ
2 H2(g) + O2(g) → 2 H2O(l) ΔH=-286 kJ
H2(g) + 12 O2(g) → H2O(l) ΔH=-286 kJ
2 H(g) + O(g) → H2O(l) ΔH=-286 kJ