Question

The value of Kp for the reaction, 2H2O(g) + 2C$\mathcal{l}$2(g) $\rightleftharpoons$ 4HC$\mathcal{l}$ (g) + O2 (g) is 0.03 atm at 427ŗ C, when the partial pressure are expressed in atmosphere then the value of KC for the same reaction is :

• A. 5.23 × 10–4
• B. 7.34 × 10–4
• C. 3.2 × 10–3
• D. 5.43 × 10–5

Answer 1

Answer: (A)

5.23 × 10–4

Answer 2

2H2O (g) + 2Cl2 (g) $\rightleftharpoons$ 2HCl (g) + O2 (g)

Kp = 0.03 T = 4270C = 700 K

Kp = KC(RT)1

$K_{C} = \frac{K_{P}}{RT} = \left\lbrack \frac{0.03}{0.082 \times 700} \right\rbrack$

KC = 5.23 × 10–4