Question

Would a photon whose wavelength is 230 nm have enough energy to photodissociate O2 whose bond energy is 495 kJ/mol? Would it have enough energy to photoionize O2?Match the words in the left column to the appropriate blanks in the sentences on the right.

Answer 1

Answer: Yes, a wavelength of 230 nm can photo ionize O2.

Step-by-step explanation:

Wavelength, λ = 230 nm = 230 ×
`10^(-9)`

Bond disassociation energy per mole = 495 kJ/mol

Bond disassociation energy per molecule =
`(495000)/(6.022*10^(23))`

= 8.22×
`10^(-19)`

Wavelength associated with this bond energy is, =
`(hc)/(E)`

=
`(1.98*10^(-25))/(E)`

= 242 nm

Therefore, any wavelength shorter than 242 nm can photo ionize O2.