Question

3. Estimate the maximum wavelength of light at which the photodissociation of O2 into two ground-state oxygen atoms occurs: O2 + hv →O+O Determine if photodissociation of O2 occurs at wavelengths longer than 300 nm.

Answer 1

O₂ the oto The enthalpy change for the reaction AH = 498.4 kJ/mol The bond dissociation a energy of O2,{= 498.4 kJ/mol Now, & = 6.02241023 67 = 6.02241023 he 6.02241023 x 6.6X20-34 x 30103 = 11 9625x1.5 > kJ/mol-1 19625410 nm Iman = 1.196257105. 498. G - 240nm ... Op cannot longer than photo dissociate at wavelengte about 240nm.

if Amin = 3oonm then Eman = 1.19 625x105 - kJ/mnd 300 = 398.75 kJ/mol