3
QuizMultiple Choice

Reversible Reactions and Equilibrium — Quiz

Question 3 • Chemistry

The reaction below is at dynamic equilibrium. cap n sub 2 times g plus 3 cap h sub 2 g long left right arrow 2 NH sub 3 g Which statement is true for the equilibrium system?

Answer
A
The rate of the forward reaction equals the rate of the reverse reaction.
B
The rate of the forward reaction is greater than the rate of the reverse reaction.
C
The concentration of NH sub 3 equals the concentration of cap n sub 2 .
D
The concentration of NH sub 3 is greater than the concentration of cap n sub 2 .

Explanation

At dynamic equilibrium, the forward and reverse reactions continue, but they occur at the same rate. This keeps the concentrations of N₂, H₂, and NH₃ constant over time. It does not mean the concentrations of NH₃ and N₂ are equal or that NH₃ must be more concentrated.

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