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Q.

In the equilibrium, 2SO2(g)+O2(g)2SO3(g), the partial pressure of SO2 , O2 and SO2 are 0.662, 0.101 and 0.331 atm respectively. What should be the partial pressure of oxygen so that the equilibrium concentration of SO3 and SO: are equal?

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a

1.0 atm

b

0.4 atm

c

0.8 atm

d

0.25 atm

answer is A.

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Detailed Solution

Kp=pSO32pSO22pO2=(0.331)2(0.662)2(0.101)=2.5
Now, Kp=pSO32pSO22pO2;
If pso3 =Pso2
Then, pO2=1Kp=12.5=0.4atm

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