Question

QUESTION 2 0.5 points Save Answ [CLO-4] Which of the following expressions is the correct Keq expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide? N204 (g) ===== 2NO2 (g) [NO21 [NO212 [NO21 A) [NO2][N204] B) C) D) E) [NO2121N2041 [N2041 [N2041 [N20412 А B с D E

Answer 1

The correct K_eq expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide is C) [NO₂]² / [N₂O₄]

As for forward reaction,rate law is -

Rate =k_f[N₂O₄]

And

for backward reaction,rate law is -

Rate =k_r[NO2]²

Therefore, at equilibrium

Rate_f = Rate_b

k_f[N₂O₄] =k_r[NO2]²

Rewriting this, it becomes

k_f/k_r = [NO2]²/ [N₂O₄]

or, K_eq =[NO2]²/ [N₂O₄]