Question

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right)+heat$
For the reaction above, what is the effect on the equilibrium position when the pressure is decreased?

• A. Increased production of products
• B. Increased production of reactants
• C. Fluctuations in the amounts of reactants and products
• D. No impact on the equilibrium
• E. Cannot be determined

Answer 1

Answer: (B)

Increased production of reactants

The given reaction is :-

$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2{NH}_3\left(g\right)+heat$

In this equilibrium, the forward reaction is accompanied by decrease in total no. of moles of gaseous species. If pressure on the system is decreased, the equilibrium shifts to the direction in which no. of moles increases as per Le Chatelier's principle. So, the backward reaction is favoured and reactants production is increased.