The bond energy of the double bond in the O₂ molecule is 5.06 eV. Verify that light must have wavelength less than???246 nm in order to break this bond. Assuming sunlight has a blackbody spectrum at T = 6000 K,what fraction of the photons in the sunlight incident on the upper atmosphere can dissociate O₂? eqs. (22.23)

and (22.24)

Repeat this calculation for the triple bond in N₂, which has a bond energy of 9.61 eV. Compare the relative importance of O₂ and N₂ as absorbers of ultraviolet light in Earth?s upper atmosphere.

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