Question

WHY THE TEMP OF GASEOUS NH3 IS KEPT LESS THAN 200C IN OSTWALD METHOD

Answer 1

The first reaction which is 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) (ΔH = −905.2 kJ) as you can see is highly exothermic (delta H is highly negative). If you keep temperature more the equilibrium shifts to the right, not only that i think even NO gets oxidized to NO2 if you increase temperature which would further decrease yield..

Answer 2

THANKS A LOT

Answer 3

No problem :)