Question

Consider the following equilibrium: 2SO2(g) + O2(g) 2SO3(g) Which of the following is a correct equilibrium expression? Keq=[SO3][SO2][O2] Keq=[SO3]2[SO2]2[O2] Keq=[SO2][O2][SO3] Keq=[SO2]2[O2][SO3]2

Answer 1

Answer : Option B)
`K_(eq) = ([SO_(3)]^(2) )/([SO_(3)]^(2) . [O_(3)]^(2))`

Explanation : The equilibrium constant is often expressed in terms of the molar concentration of products divided by the product of molar concentrations of reactants.

So,
`K_(eq) = ([products])/([reactants])`.

Now, here in the given reaction of


`2SO_(2) + O_(2) ----\ \textgreater \ 2SO_(3)`

So, we have the equation for equilibrium as
`K_(eq) = ([SO_(3)]^(2) )/([SO_(3)]^(2) . [O_(3)]^(2))`