Equilibrium Question 658

Question: In the reaction, H2+I22HI . In a 2 litre flask 0.4 moles of each H2 and I2 are taken. At equilibrium 0.5 moles of HI are formed. What will be the value of equilibrium constant, Kc [CPMT 2004]

Options:

A) 20.2

B) 25.4

C) 0.284

D) 11.1

Show Answer

Answer:

Correct Answer: D

Solution:

H20.4,0.40.25 = 0.15, + I20.4,0.40.25 = 0.15/2,2HI0.50,0.50/2,

Kc=[HI]2[H2][I2]=[0.52]2[0.152],[0.152]

=0.5×0.50.15×0.15=11.11



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