5 moles of `SO_(2)`and 5 moles of `O_(2)` are allowed to react .At equilibrium , it was foumnd that `60%` of `SO_(2)` is used up .If the pressure of the equilibrium mixture is one aatmosphere, the parital pressure of `O_(2)` is :

Options

A. 0.52 atm
B. 0.21 atm
C. 0.41 atm
D. 0.82 atm

Answer

C

Explanation

Initially `underset(5)(2SO_(2g))+underset(5)(O_(2(g)))hArrunderset(0)(2SO_(3(g)))`
Degree of dissociation = 0.60
`:.` no. of moles of `SO_2` at equilibrium =2
no. of moles of `O_2` at equilibrium = 3.5
no. of moles of `SO_3` produced at equilibrium =3
`:. pO_2 =(3.5 xx1)/(8.5)=0.41 ` atm