The Reaction: 2 HI → H₂ + I₂,is Second Order

question 126

Multiple Choice

The reaction: 2 HI → H₂ + I₂,is second order and the rate constant at 800 K is 9.70 × 10^-2 M^-1 s^-1.How long will it take for 8.00 × 10^-2 mol/L of HI to decrease to one-fourth of its initial concentration?

• A)0.619 s
• B)124 s
• C)387 s
• D)429 s

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