Calculate the standard enthalpy of formation of FeS2 (s) at 565°C from the following data at 298,15 K Assume that the heat capacities are independent of temperature, Substance Fe(s) FeS2(s) Fe2O3(s) S(rhombic) SO2(g)
AH (kJ - mol )
-8242
-296.81
Cp, m/R
3.02 7.48
2.72
You are also given that for the reaction 2FeS2(s) + 402(g) → Fe, O3(s) + 4SO2(g) AH = -1655 kJ - mol!
Express your answer to four significant figures and include the appropriate units.