CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium
Problem
For the reaction A(g)+B(g)⇌2C(g) at a fixed temperature, the equilibrium constant is K=4.0. A chemist records the following particle counts (constant volume) at three successive times:
Time I: A=6, B=6, C=3
Time II: A=3, B=3, C=6
Time III: A=2, B=4, C=5
At which recorded time is the system most likely to be at equilibrium for the first time?
(a) Time I
(b) Time III
(c) Time II
(d) None of the times shown; equilibrium has not been attained.