Equilibrium Question 766

Question: 3.2 moles of hydrogen iodide were heated in a sealed bulb at $ 444{}^\circ C $ till the equilibrium state was reached. Its degree of dissociation at this temperature was found to be 22% The number of moles of hydrogen iodide present at equilibrium are

Options:

A) 2.496

B) 1.87

C) 2

D) 4

Show Answer

Answer:

Correct Answer: A

Solution:

$ 2HI\rightarrow H_2+I_2 $ . is 22% decomposed,
$ \therefore \frac{3.20\times 22}{100}=0.704 $

$ ( 3.2-0.704 ) $ is equal to HI present at equilibrium which is = 2.496



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