(Originais Teachy 2023) - Question Very Hard of Chemistry

Consider the combustion reaction of methane, CH4(g), which can be represented by the equation: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l) DeltaH1 = -890.4 kJ. From the enthalpy of combustion of methane, it is known that the enthalpy of formation of methane, DeltaHf0(CH4), and the enthalpy of formation of carbon dioxide, DeltaHf0(CO2), are respectively -74.8 kJ/mol and -393.5 kJ/mol. Using Hess's Law and the concept of formation enthalpy, determine the enthalpy change for the formation reaction of methane from the elements in their standard states. Consider that the formation reaction of methane from the elements in their standard states is: C(s) + 2H2(g) -> CH4(g) DeltaH2 = ?