For the reaction H₂(g)+ I₂(g) 2HI(g), K_c = 50.2 at 445ºC.If [H₂] = [I₂] = [HI] = 1.75 × 10^-3 M at 445ºC.Which of the following is true based on the above?

Question

Quizplus · Accepted Answer

Since the reaction is of the form A + B ⇌ C, the reaction quotient, Qc, can be written as: Qc = [C]/([A][B]) At equilibrium, Qc = Kc, the equilibrium constant. Given that at 445ºC, Kc = 50.2, [H₂] = [I₂] = [HI] = 1.75 × 10^-3 M, we can determine the value of Qc as: Qc = [2HI]2/[H₂][I₂] = (2*1.75*10^-3)^2/(1.75*10^-3)^2 = 4 Since Qc < Kc, the reaction has not yet reached equilibrium and will proceed from left to right to reach equilibrium according to Le Chatelier's principle. Therefore, the correct answer is choice C.

For the Reaction H2(g)+ I2(g) 2HI(g), Kc

For the Reaction H₂(g)+ I₂(g) 2HI(g), K_c