CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium
Problem
At 1000 K the reaction
2SO2(g)+O2(g)⇌2SO3(g)
has Kp=3.5. A rigid 10.0 L vessel initially contains an equilibrium mixture of the gases at a total pressure of 1.00 atm. The volume of the vessel is then rapidly compressed to 5.00 L at the same temperature. Immediately after compression, which statement best predicts the direction of the net reaction?
(a) Qp>Kp; net formation of SO2 and O2 will occur (shift left).
(b) Qp=Kp; the system remains at equilibrium, so no shift occurs.
(c) Qp<Kp; net formation of SO3 will occur (shift right).
(d) Kp decreases when pressure increases; therefore the reaction will shift left, forming SO2 and O2.