We know that Nitric acid is obtained from the reaction of ammonia with O as seen below:

4 NH₃ (g) + 5 O₂ (g) --> 4 NO (g) + 6 H₂O (g)

Given: 1 mol/min Ammonia

Also, there is 7 mol/min air that is present. The composition of air is 79 percent N2, and O2 is 21 percent. This enters a specific reactor at 343.15 K. Note that 75 percent conversion of the said HCl was done hence there is no other considered side reacrion.

Given this, what is the heat required if the T of gas is 773.15K when leaving