whith of the following represents the standard enthalpy of Formation for the compound formed in the following reaction? N2(g) +202(g) 2NO2(g) AH = +66.4k] 2CO(g) + O2(g) 2C02(8) AH -568 kJ SO3(g) + H20m) - H2SO401) AH = - 814 kJ H2(g) + F2(8) - HF) AH = -273 kJ