Answer to Question #207753 in Physical Chemistry for pesky

Question

state the reasons why irradiation that produces excited electronic state alters the reactivity of some molecules

Answer 1

Absorption of light in the ultraviolet and visible regions produces changes in the electronic energies of molecules associated with excitation of an electron from a stable to an unstable orbital. Because the energy required to excite the valence-shell electrons of molecules is comparable to the strengths of chemical bonds, absorption may lead to chemical reactions.