A particulate diagram for the reaction A (g) ⇌ 2B (g) shows 10 particles of A and 10…
CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium
Problem
A particulate diagram for the reaction A (g) ⇌ 2B (g) shows 10 particles of A and 10 particles of B in a rigid 1 L container at a fixed temperature. Which statement is most accurate regarding whether the system is at equilibrium?
(a) The system is at equilibrium because the container is sealed and the temperature is constant, so the particle counts cannot change.
(b) The information is insufficient; equal particle counts alone cannot confirm equilibrium without knowing the relative reaction rates.
(c) The system is not at equilibrium because, according to the balanced equation, the B particle count should be twice that of A at equilibrium.
(d) The system is at equilibrium because the equal numbers of A and B particles prove that no net reaction is occurring.