Chemistry - Chemical Equilibrium Question with Solution | TestHub
A catalyst is added to the system N2(g) + 3H2(g) ⇌ 2NH3(g) at equilibrium at constant temperature. Which of the following is/are correct?
Options:(select one or more)
Answer:
Solution:
A catalyst provides an alternative reaction pathway with a lower energy barrier. Since the energy of the reactants and products remains unchanged, both the forward and reverse activation energies decrease by the same amount. Therefore, statement (a) is correct.
A lower activation energy increases both the forward and reverse rate constants. Thus, statement (b) is correct.
Because the forward and reverse reaction rates increase equally, the equilibrium composition and the equilibrium constant (K) do not change. Therefore, statement (c) is incorrect.
The change in enthalpy (ΔH) depends only on the initial and final states of the reaction, which are unaffected by a catalyst. Consequently, ΔH remains unchanged. Therefore, statement (d) is incorrect.
The correct options are (a) and (b).
