Question

For the reaction $2NO\left(g\right)\rightleftharpoons N_2\left(g\right)+O_2\left(g\right),\Delta H=-180kJmo{l}^{-1}$. Which of the following facts does not hold well?

• A. The pressure changes at constant temperature do not affect the equilibrium constant
• B. The volume changes at constant temperature do not affect the equilibrium constant
• C. The dissociation of NO is favored more at high temperature
• D. The dissociation of NO is favored less at high temperature

Answer 1

The correct option is C

The dissociation of NO is favored more at high temperature

Pressure changes do not affect equilibrium constant and hence equilibrium concentrations are not changed. Since the reaction is exothermic, increasing temperature shifts the equilibrium towards the reactant side. Hence, lesser of NO is dissociated.