Answer: Yes, a wavelength of 230 nm can photo ionize O2.
Explanation:
Wavelength, λ = 230 nm = 230 × [tex]10^{-9}[/tex]
Bond disassociation energy per mole = 495 kJ/mol
Bond disassociation energy per molecule = [tex]\frac{495000}{6.022\times10^{23}}[/tex]
= 8.22×[tex]10^{-19}[/tex]
Wavelength associated with this bond energy is, =[tex]\frac{hc}{E}[/tex]
= [tex]\frac{1.98\times10^{-25}}{E}[/tex]
= 242 nm
Therefore, any wavelength shorter than 242 nm can photo ionize O2.
