A 250-Mol Sample of HI Is Placed in a 1

question 91

Multiple Choice

A 2.50-mol sample of HI is placed in a 1.00-L vessel at 460°C,and the reaction system is allowed to come to equilibrium.The HI partially decomposes,forming 0.190 mol H₂ and 0.190 mol I₂ at equilibrium.What is the equilibrium constant K_c for the following reaction at 460°C?
1/2 H₂(g) + 1/2 I₂(g)
HI(g)

• A)1.23 × 10²
• B)8.10 × 10^-3
• C)1.72 × 10^-2
• D)11.1
• E)7.63

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