The reaction of nitrogen with oxygen to form nitrogen monoxide can be represented by the following equation. N₂(g) + O₂(g) ⇄ 2NO(g)
At 2000°C, the equilibrium constant, K_c, has a value of 4.10 × 10⁻⁴. What is the value of K_p?

Question

Quizplus · Accepted Answer

The equilibrium constant, Kc, is related to the equilibrium constant, Kp, by the equation Kp = Kc(RT)Δn, where Δn is the difference in the number of moles of gaseous products and gaseous reactants. In this case, Δn = 2 - 1 - 1 = 0, because there is one mole of nitrogen and one mole of oxygen on each side of the equation, and two moles of nitrogen monoxide. Since Δn = 0, Kp = Kc. Therefore, the value of Kp is 4.10 × 10^-14, which is the same as the value of Kc given in the problem. Hence, the answer is B.

The Reaction of Nitrogen with Oxygen to Form Nitrogen Monoxide