The enthalpy of formation of magnesium oxide, MgO(s), is 601827 kJ/kmol at 25C. The melting point of magnesium oxide is approximately 3000 K, and the increase in enthalpy between 298 and 3000 K is 128449 kJ/ kmol. The enthalpy of sublimation at 3000 K is estimated at 418000 kJ/ kmol, and the specific heat of magnesium oxide vapor above 3000 K is estimated at 37.24 kJ/ kmol K.
a. Determine the enthalpy of combustion per kilogram of magnesium.
b. Estimate the adiabatic flame temperature when magnesium is burned with theoretical oxygen.