5.(30pts) (a) Consider the reaction 2 SO3(g) = 2 SO2(g) + O2(g) Kc= 0.0750 at so

Question

5.(30pts) (a) Consider the reaction 2 SO3(g) = 2 SO2(g) + O2(g) Kc= 0.0750 at some temperature T. Write the Kc expression (b) Using information from part (a) determine the value of K. at the same temperature T for 4 SO3(g) 4 SO2(g) + 2 02(2) (o) If 3.6 moles of SOs(g), 2.7 moles of SO-g) and 4.0 moles of 0rg) are placed in a 3 liter sealed flask, compute the reaction quotient Qc for the reaction of part (a) Is the system at equilibrium? If not, in what direction will it shift to establish equilibrium?

Explanation / Answer

b) 2* equation in part a.

so that, Kc = 0.075^2 = 0.005625

c) Qc = [O2][SO2]^2/[SO3]^2

      = ((4/3)*(2.7/3)^2)/((3.6/3)^2)

      = 0.75

Qc > Kc. so that,backward reaction takes place.

and equilibrium shift to left to reach equilibrium.

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