Question

In which of the following reactions, increase in the volume at constant temperature don't effect the number of moles of at equilibrium :

• A. ${2NH}_3\rightleftharpoons N_2+{3H}_2$
• B. ${C\left(g\right)+\left(1/2\right)O}_2\left(g\right)\rightleftharpoons CO\left(g\right)$
• C. $H_2\left(g\right)+O_2\left(g\right){\rightleftharpoons H}_2{O}_2\left(g\right)$
• D. $H_2+I_2\to 2HI$

Answer 1

Answer: (D)

$H_2+I_2\to 2HI$

In the reaction of option D, the total number of moles of reactants is equal to the number of moles of product. For such reactions, when pressure is changed, there is no change in equilibrium.