Nitric oxide is formed in automobile exhaust when nitrogen a

Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures.

N₂(g) + O₂(g) 2NO(g)

The equilibrium constant K_p for the reaction is 0.31 at 1200 °C. If a container is charged with 0.344 atm of nitrogen and 0.454 atm of oxygen and the mixture is allowed to reach equilibrium, what will be the equilibrium partial pressure of nitric oxide? Report your answer to three significant figures

Solution

N2(g) + O2(g) = 2NO(g)

Kp = P_NO2² / (P_N2 * P_O2)

GIven   P_N2 = 0.344 atm

  P_O2 = 0.454 atm

Kp = 0.31

put all these values in the formula of Kp.

0.31 = P_NO2² / (0.344 * 0.454)

P_NO2² = 0.0484

P_NO2 = 0.220 atm