Question

Consider the following system at equilibrium where AH = -16.1 kJ, and K. = 154, at 298 K. 2NO(g) + Brz(g) 2NOBr(g) If the VOLUME of the equilibrium system is suddenly decreased at constant temperature: The value of K. A. increases. B. decreases. C. remains the same. The value of Qc A. is greater than K. B. is equal to K C. is less than K The reaction must: A. run in the forward direction to reestablish equilibrium. B. run in the reverse direction to reestablish equilibrium. C. remain the same. It is already at equilibrium. The number of moles of Br, will: A. increase. B. decrease. C. remain the same.

Answer 1

If the volume decreases, the reaction moves to where there are less gaseous moles, to products. Kc increases, Qc is less than Kc.

The reaction must go in the forward direction to restore the balance. The moles of Br2 decrease.

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