NO as a catalyst for O2 to O3

Arrhenius Equation:

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NO as a catalyst for O2 to O3

Postby haleyervin7 » Wed Mar 13, 2019 9:13 pm

In this environmental example Dr. Lavelle explained in class today, must NO always be present for the reaction from oxygen to ozone to occur, or is it just that it makes it happen more often/easily?

Nathaniel 2E
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Re: NO as a catalyst for O2 to O3

Postby Nathaniel 2E » Wed Mar 13, 2019 10:35 pm

NO does not *need* to be present for the reaction to occur, but, realistically, you will only find oxygen gas becoming ozone with the presence of a catalyst. The activation energy barrier to go from oxygen gas to ozone is too high for that reaction to occur with any frequency, but it is still possible, just very, very rare.

Extrapolating this further, the only thing that a catalyst does is allow reactions to occur with greater frequency by lower the activation energy through a new pathway- this means that if there is no high energy pathway to begin with, then a catalyst can do nothing. In other words, a catalyst helps a reaction along, but does not cause disparate species to react.

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