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08/10/2021 1:25 pm
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3.2 moles of hydrogen iodide were heated in a sealed bulb at 444°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
(a) 2.496
(b) 1.87
(c) 2
(d) 4
1 Answer
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08/10/2021 1:28 pm
Correct answer: (a) 2.496
Explanation:
2HI ⇌ H2 + I2
It is 22% decomposed,
∴ \(\frac{3.20 \times 22}{100}\)
= 0.704
(3.2 - 0.704) is equal to HI present at equilibrium which is = 2.496