Enthalpy of Formation WorksheetWrite the enthalpy of formation reaction for the following compounds:1. H2O(g)2. C3H8(g)3. CO2(g)Use the standard enthalpies of formation table to determine the ΔHrxn for each of the following reactions.(You must know the enthalpy of formation for all elements = 0. Pay attention to states of matter.)Compound ΔHf (kJ/mol) Compound ΔHf (kJ/mol) CH4(g) -74.8 NaOH(s) -426.7CO2(g) -393.5 NH3(g) -46.2CO(g) -110.5 NH4Cl(s) -315.4HCl(g) -92.3 NO(g) +90.4H2O(l) -285.8 NO2(g) +33.9H2O(g) -241.8 SnCl4(l) -545.2H2S(g) -20.1 SnO(s) -286.2H2SO4(l) -811.3 SnO2(s) -580.7MgSO4(s) -1278.2 SO2(g) -296.1MnO(s) -384.9 SO3(g) -395.2MnO2(s) -519.7 ZnO(s) -348.0NaCl(s) -411.0 ZnS(s) -202.9NaF(s) -569.04. NaOH(s) + HCl(g) ----> NaCl(s) + H2O(g)5. 2 H2S(g) + 3 O2(g) ---> 2 H2O(l) + 2 SO2(g)6. 2 NO(g) + O2(g) ---> 2 NO2(g)-7. 2 CO(g) + O2(g)  2 CO2(g)-8. CH4(g) + 2O2(g)  CO2(g) + 2H2O(l)9. Calculate the standard enthalpy of formation of xylene, C8H10(l), if its heat of combustion, ΔH°comb, is -3908 kJ as described by the equation C8H10(l) + 212O2(g)  5H2O(l) + 8CO2(g). 10. Calculate the heat of formation of ethane, C2H6(g), if its heat of combustion, ΔH°comb, is -3120. kJ as described by the equation 2C2H6(g) + 7O2(g)  6H2O(l) +