Equilibrium Question 634
Question: At a certain temp. 2HI ⇌ H2 + I2 Only 50% HI is dissociated at equilibrium. The equilibrium constant is [DCE 1999]
Options:
A) 0.25
B) 1.0
C) 3.0
D) 0.50
Show Answer
Answer:
Correct Answer: A
Solution:
$ \underset{50}{\mathop{\underset{100}{\mathop{2HI}},}}, $ ⇌ $ \underset{25}{\mathop{\underset{0}{\mathop{H_2}}}},+\underset{25}{\mathop{\underset{0}{\mathop{I_2}},}}, $
$ \frac{[H_2][I_2]}{{{[HI]}^{2}}}=\frac{25\times 25}{50\times 50}=0.25 $ .
