Question

Which statement is true of a system at equilibrium?

a) Changes in the system are visible, but there are no changes at the molecular level.
b) There are no observable changes because there are no changes at the molecular level.
c) There are no observable changes, but reactions continue at the molecular level.
d) Changes in the system are visible because reactions continue at the molecular level.

Answer 1

[AI-generated answer — Bot]

The correct answer is (c) There are no observable changes, but reactions continue at the molecular level. At equilibrium, the forward and reverse reactions are occurring at the same rate, so there is no net change in the concentrations of reactants and products. However, the individual molecules are still reacting and interconverting, just at equal rates, so there are no observable changes.