Question

When ch3i molecules in the vapor state absorb 253.7 nm light they dissociate into methyl radicals and iodine atoms the energy required to rupture?

Answer 1

Wavelenght = 253.7 nm = 253.7 x 10^-^9 m

Energy of photon associated with this wavelength,
=
`\frac{\text{Planck's constant X speed of light}}{\text{wavelenght}}`
=
`(6.629X10^-^3^4X3X10^8)/(253.7X10^-^9)`
= 7.838 X
`10^(-19)` J

Thus, energy required to rupture C-I bond is 7.838 X 10^(-19) J