College Board AP Classroom Unit 7 Progress Check: MCQ 100% 60 LOT / 2 DOON 28 ——- --0- -0-0-0-0-0-0-0-0- - —~— 2 S0,(9) + 0,0) = 2 80,() K, 2 x 10% At a certain temperature, SO,(9) and (o) react to produce SO, (s) according to the chemical equation shown above. An evacuated rigid vessel is originally filled with SO, () and O.), each with a partial pressure of 1 atm. Which of the following is closest to the partial pressure of 0,9) after the system has reached equilibrium, and why? A) atm because K, is very large, nearly all the SO, () and 0,6) are consumed before the system reaches equilibrium B) 0.5 atm, because K is very large, nearly all the SO, () is consumed before the system reaches equilibrium, but an excess amount of O,() remains at equilibrium ) C)1 atm, because K, is very large, the system is already near equilibrium, and there will be very little change to the partial pressure of O,G). increases the amount of O,Co) tequilibrium D) 1.5 atm because K, is very lwg, the decomposition of any so, (o) that for