Chemistry
Chemistry
Problem
Which of the following statements correctly identifies a defining characteristic of a chemical system that has reached dynamic equilibrium in a closed container at constant temperature? a) The forward and reverse reaction rates decrease to zero, so the system becomes static. b) The forward and reverse reaction rates are equal, so no net change in concentrations occurs. c) The concentrations of reactants and products remain constant because they are equal at equilibrium. d) The equilibrium constant becomes , indicating equal amounts of reactants and products.Intuitive explanation
Dynamic equilibrium is about balance in motion—not stillness, but equal rates. The key insight is that at equilibrium, the forward and reverse reactions continue happening, but they occur at the same speed, so macroscopic properties like concentration, color, and pressure stay constant even though molecules keep reacting. Look for an answer describing ongoing molecular change paired with unchanging observable quantities.
Intuitive explanation
Dynamic equilibrium is about balance in motion—not stillness, but equal rates. The key insight is that at equilibrium, the forward and reverse reactions continue happening, but they occur at the same speed, so macroscopic properties like concentration, color, and pressure stay constant even though molecules keep reacting. Look for an answer describing ongoing molecular change paired with unchanging observable quantities.