Question

The reaction below is at dynamic equilibrium. mc004-1.jpg Which statement is true for the equilibrium system? The concentration of NH3 is greater than the concentration of N2. The concentration of NH3 equals the concentration of N2. The rate of the forward reaction equals the rate of the reverse reaction. The rate of the forward reaction is greater than the rate of the reverse reaction.

Answer 1

Answer: The correct statement is :

'The rate of the forward reaction equals the rate of the reverse reaction'.

Explanation:

Dynamic Equilibrium : A chemical reaction is said to be in equilibrium if the concentration of reactant and products become constant. The rate of the reaction going forward is equal to the rate of reaction going backward. Hence, reversible reaction.

Only rates of the backward and forward reaction are equal not the the concentrations.

According to the given reaction:

$2NH_3\rightleftharpoons N_2+3H_2$

Rate of the decomposition of ammonia is equal to the rate of formation of ammonia from hydrogen gas and nitrogen gas.

From the given statements the correct statement is:'

The rate of the forward reaction equals the rate of the reverse reaction'.

Answer 2

When a system is in dynamic equilibrium, the forward reaction rate and the backward reaction rate are equal or occurs at the same rate. Therefore, the third option above is the most accurate one. Hope this answers the question. Have a nice day.