8. Molecular iodine, I2(g), dissociates into iodine atoms at 625K with a first-order rate constant of 0.271 s-¹. (a) What is the half-life for this reaction? (b) If you start with 0.050 M 12 at this temperature, how much will remain after 5.12 s assuming that the iodine atoms do not recombine to form I?

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8. Molecular iodine, I2(g), dissociates into iodine atoms at 625K with a first-order rate constant
of 0.271 s-¹. (a) What is the half-life for this reaction? (b) If you start with 0.050 M 1₂ at
this temperature, how much will remain after 5.12 s assuming that the iodine atoms do not
recombine to form I?
9. The activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the
fraction of methyl isonitrile molecules that has an energy equal to or greater than the activation
energy at 500 K. Careful with your units!
Transcribed Image Text:8. Molecular iodine, I2(g), dissociates into iodine atoms at 625K with a first-order rate constant of 0.271 s-¹. (a) What is the half-life for this reaction? (b) If you start with 0.050 M 1₂ at this temperature, how much will remain after 5.12 s assuming that the iodine atoms do not recombine to form I? 9. The activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy equal to or greater than the activation energy at 500 K. Careful with your units!
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