Two gases are placed in a sealed flask and allowed to react. Which statement is true about this closed system when it reaches dynamic equilibrium?

Both reactants and products will be present, but forward and reverse reactions will stop.
Particles of the products will be present, but no particles of the reactants will remain.
The concentration of the reactants and the concentration of the products will be equal.
The rate of the forward reaction and the rate of the reverse reaction will be equal.

Question

Two gases are placed in a sealed flask and allowed to react. Which statement is true about this closed system when it reaches dynamic equilibrium?

 Both reactants and products will be present, but forward and reverse reactions will stop.
 Particles of the products will be present, but no particles of the reactants will remain.
 The concentration of the reactants and the concentration of the products will be equal.
 The rate of the forward reaction and the rate of the reverse reaction will be equal.

anonymous · Answer

@sweetburger

arindameducationusc · Answer

At Equilibrium, the rate of forward reaction becomes equal to the rate of the backward reaction so that there is no net change in the concentration of various species. In other words, the equilibrium state is a dynamic balance between the forward and the backward reaction.

The equilibrium can be attained only if the system is closed.
At equilibrium, the rate of forward reaction becomes equal to the rate of backward reaction therefore the equilibrium is dynamic in nature...

So, I hope you got your answer.
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