From these data,
S(rhombic) + O2(g) → SO2(g) ΔH°rxn = −296.06 kJ/mol
S(monoclinic) + O2(g) → SO2(g) ΔH°rxn = −296.36 kJ/mol
calculate the enthalpy change for the transformation
S(rhombic) → S(monoclinic)
(Monoclinic and rhombic are different allotropic forms of elemental sulfur.)