The Equilibrium Constant, K_p, for the Reaction H₂(g) + I₂(g)

question 39

Multiple Choice

The equilibrium constant, K_p, for the reaction H₂(g) + I₂(g) ⇄ 2HI(g)
Is 55.2 at 425°C. A rigid cylinder at that temperature contains 0.127 atm of hydrogen, 0.134 atm of iodine, and 1.055 atm of hydrogen iodide. Is the system at equilibrium?

• A)Yes.
• B)No, the forward reaction must proceed to establish equilibrium.
• C)No, the reverse reaction must proceed to establish equilibrium.
• D)Need to know the volume of the container before deciding.
• E)Need to know the starting concentrations of all substances before deciding.

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