試題詳解

20. Which of the following statements is true?
(A) When two opposing processes are proceeding at identical rates, the system is at equilibrium.
(B) Catalysts are an effective means of changing the position of an equilibrium.
(C) The concentration of the products equals that of reactants and is constant at equilibrium.
(D) An endothermic reaction shifts toward reactants when heat is added to the reaction.