Question

For the equilibrium `2NOBr(g) hArr2NO + Br_(2)(g)` , calculate the ratio `(K_(p))/(P)`, where P is the total pressure and `P_(Br_(2)) = (P)/(9)` at a certain temperature
A. `(1)/(9)`
B. `(1)/(81)`
C. `(1)/(27)`
D. `(1)/(3)`

Answer 1

Correct Answer - B
`2NOBr(g) hArr 2NO(g) + Br_(2)(g)`
At equilibrium `P - (2P)/(9) = (6P)/(9)` `(2P)/(9)` `(P)/(9)`
`P_(T) = (6P)/(9) + (2P)/(9) + (P)/(9) = P`
`K_(p) = (((2P)/(9))^(2)xx((P)/(9)))/(((6P)/(9))^(2)) = (K_(p))/(P) = (1)/(81)`