Chemistry

Problem

The balanced reaction below reaches equilibrium at a certain temperature.

2\text{HI}(g)+\text{Br}_2(l) \rightleftharpoons 2\text{HBr}(g)+\text{I}_2(s)

Which of the following expressions is the correct form of

K_c

for this equilibrium? a)

\dfrac{[\text{HBr}]}{[\text{HI}]}

\dfrac{[\text{HI}]^{2}}{[\text{HBr}]^{2}}

\dfrac{[\text{HBr}]^{2}}{[\text{HI}]^{2}}

\dfrac{[\text{HBr}]^{2}[\text{I}_2]}{[\text{HI}]^{2}[\text{Br}_2]}