Question

The equilibrium constant for the reaction,N2(g) + O2 (g) $\rightleftharpoons$ 2NO(g) at temperature T is 4 × 10–4 . The value of Kc for the reaction, NO(g) $\rightleftharpoons$ N2 (g) + $\frac{1}{2}$ O2 (g) at the same temperature is

• A. 2.5 × 102
• B. 0.02
• C. 4 × 10–4
• D. 50

Answer 1

Answer: (D)

50

Answer 2

$N_{2}(g) + O_{2}(g)$ $\rightleftharpoons$ $2NO(g)$;

$K_{c} = \frac{\lbrack NO\rbrack^{2}}{\left\lbrack N_{2} \right\rbrack\left\lbrack O_{2} \right\rbrack} = 4 \times 10^{- 4}$

$\rightleftharpoons$ $NO(g)$ $N_{2}(g) + \frac{1}{2}O_{2}(g);$