A chemical system is considered to have reached dynamic equilibrium when the rate of production of each of the product species is equal to the rate of consumption of each of the reactant species. the activation energy of the forward reaction is equal to the activation energy of the re-verse reaction. the rate of production of each of the products is equal to the rate of their consumption by the reverse reaction. the sum of the concentrations of each of the reactant species is equal to the sum of the concentrations of each of the product species. the frequency of collisions between the reactant molecules is equal to the frequen y of collisions between the product molecules