APFIVE Reaction Quotient and Equilibrium Shift
Consider the equilibrium reaction $$2*NO_2 (g) \rightleftharpoons N_2O_4 (g)$$. If the initial concentrations are [NO₂] = 0.8 M and [N₂O₄] = 0.2 M, and the equilibrium constant is K = 0.5, calculate the reaction quotient $$Q = \frac{[N_2O_4]}{[NO_2]^2}$$ and determine the net direction in which the reaction will shift.
A
The reaction shifts to the right because Q (≈ 0.3125) is less than K.
B
No net shift occurs because Q equals K.
C
The reaction first shifts left then right due to kinetic factors.
D
The reaction shifts to the left because Q is greater than K.
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