What is the maximum wavelength a photon can have if it is to possess sufficient energy to cause this dissociation?

The maximum wavelength a photon which can dissociate Ozone atom into molecular oxygen and atomic oxygen is 1138 nm.

The complete question is what is the maximum wavelengtha photon have to split an Ozone atom into molecular oxygen and atomic oxygen?

The reaction is

The Enthalpy of the reaction,

The energy to split one molecule is,

The energy of photon is,

The energy of photon will be equal to the enthalpy change,

In electromagnetic spectrum 1138 nm comes in Infrared region.

Hence, we can conclude that The maximum wavelength a photon which can dissociate Ozone atom into molecular oxygen and atomic oxygen is 1138 nm.

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