Peroxyacyl nitrates contain two relatively weak bonds that can be broken by low-energy photons.  The weakest  is the N−O bond in the nitrate functional group of the molecule with a standard bond-dissociation energy of 201 kJ/mol.  What is the longest wavelength of a photon, in nanometers, that has enough energy to cause the photodissociation of the weakest bond. Assume all energy of the photon is efficiently used for the photodissociation.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Peroxyacyl nitrates contain two relatively weak bonds that can be broken by low-energy photons.  The weakest  is the N−O bond in the nitrate functional group of the molecule with a standard bond-dissociation energy of 201 kJ/mol.  What is the longest wavelength of a photon, in nanometers, that has enough energy to cause the photodissociation of the weakest bond. Assume all energy of the photon is efficiently used for the photodissociation.

One of the highest concentrations of peroxyacyl nitrates has been found in the Los Angeles (LA) basin at 30.0 mol of peroxyacetyl
nitrate per 1 billion moles of air (30 ppb), reaching its peak at mid-afternoon. Most of the pollution in the LA basin is created in an area
of only 3000 km² and the pollution depth below the inversion layer is normally about 500 m. This concentration was therefore found in
1500 km³ of air above Los Angeles.
Transcribed Image Text:One of the highest concentrations of peroxyacyl nitrates has been found in the Los Angeles (LA) basin at 30.0 mol of peroxyacetyl nitrate per 1 billion moles of air (30 ppb), reaching its peak at mid-afternoon. Most of the pollution in the LA basin is created in an area of only 3000 km² and the pollution depth below the inversion layer is normally about 500 m. This concentration was therefore found in 1500 km³ of air above Los Angeles.
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