Consider the following system at equilibrium at 698 K: 2 HI (g) H₂ (g) + I₂ (9) When some H₂ (g) is added to the equilibrium

Question

Consider the following system at equilibrium at 698 K:
2 HI (g) H₂ (g) + I₂ (9)
When some H₂ (g) is added to the equilibrium system at constant temperature:
The reaction must:
The concentration of I2 will:
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.
A. Increase.
B. Decrease.
C. Remain the same.

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