Equilibrium Question 630
Question: 4.5 moles each of hydrogen and iodine heated in a sealed ten litre vessel. At equilibrium, 3 moles of $ HI $ were found. The equilibrium constant for $ H_2(g)+I_2(g) $ ⇌ $ 2HI(g) $ is [EAMCET 1998]
Options:
A) 1
B) 10
C) 5
D) 0.33
Show Answer
Answer:
Correct Answer: A
Solution:
$ H_2\ +\ I_2 $ ⇌ 2HI Initial conc. 4.5 4.5 0 x x 2x from question 2x = 3 $ x=\frac{3}{2}=1.5 $ So conc. at eqm. $ 4.5-1.5 $ of $ H_2 $
$ =4.5-1.5 $ of $ I_2 $ and 3 of HI $ K=\frac{{{[HI]}^{2}}}{[I_2][H_2]}=\frac{3\times 3}{3\times 3}=1 $ .
