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Question

The degree of dissociation of SO3 is α at equilibrium pressure P. KP for SO3(g)SO2(g)+12O2(g)

A
P2α22(1α)3
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B
P12α3/2(1α)(2+α)1/2
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C
P2α22(1α)2
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D
None of these
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Solution

The correct option is B P12α3/2(1α)(2+α)1/2
SO3(g)SO2(g)+12O2(g)
11ααα2
Total no. of moles =1+α2
PSO3=(1α)P1+α2PSO2=(αP)1+α2PO2=(α2)P1+α2
KP=PSO2×P12O2PSO3

putting the respective values,

KP=P12α3/2(1α)(2+α)1/2

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