This equation for an equilibrium system is given: 2COF_2(g) CO_2(g) + CF_2(g) Wh

Question

This equation for an equilibrium system is given: 2COF_2(g) CO_2(g) + CF_2(g) Which of the following sentences is true about the system after it reaches equilibrium? (A) The [CO_2] is gradually increasing as the forward reaction continues to occur (B) The [CO_2] is gradually decreasing as the reverse reaction continues to occur (C) The [CO_2] is constant since the forward and reverse reactions have both stopped. (D) The [CO_2] remains constant while the forward and reverse reaction continuous to occur. Consider the following system in equilibrium: 2A + B C + 3D In this system, A, B, C and D are all gaseous entities. At a time t_0, a catalyst is added, and the mixture is allowed to reach equilibrium once again. Which of the following statements bets describes the effect of this change forward rate of reaction of A? (A) The forward rate of reaction increases, but change of A change. (B) The forward rate of reaction increases, and the concentration of A (C) Neither the forward rate of reaction nor the concentration of (D) The forward rate of reaction and the concentration of A increase.

Explanation / Answer

(12)

(D)

Because equilibrium is a state of reversible reaction at which the rate of both forward and backward reactions are equal.

(13) (A) The forward rate of reaction increases but the concentration of reactant A does not change at equilibrium.

Because catalyst does only increase in the rate of forward and backward reaction equally but it does not affect the cocentraitons of reactants and products at equilibrium.

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