The standard heat of reaction for the oxidation of ammonia is shown below: 4NH3 (g) + 502 (g) 4N0 (g) + 6H20 (v) A, = - 904.7 kJ/mol 80 mol NH3/s and 100 mol 02/s at 25 C are fed into a reactor in which the ammonia is completely consumed. The product gas emerges at 200 C. Calculate the rate at which heat must be transferred to or from the reactor, assuming operation at 1 atm