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12.5 Exercise 13

Avg difficulty 2.5

Hydrogen iodide, HI, decomposes in the gas phase to produce hydrogen, H2, and iodine, I2. The value of the rate constant, k, for the reaction was measured at several different temperatures and the data are shown here:

Temperature (K) k (L mol−1 s−1)
555 6.23 ×\times 10−7
575 2.42 ×\times 10−6
645 1.44 ×\times 10−4
700 2.01 ×\times 10−3

What is the value of the activation energy (in kJ/mol) for this reaction?

OpenStax Chemistry 2e, 12.5 Collision Theory, exercise 13

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Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.