The energy from radiation can be used to cause the rupture of chemical bonds. a minimum energy of 242 kj/mol is required to break the chlorine–chlorine bond in cl2. determine the longest wavelength of radiation that possesses the energy to break the bond.

The longest wavelength of radiation is 494.6 nm that will possess the energy to break the bond.

Explanation:

Energy required to break 1 mol of Cl-Cl bond = 242 kJ =242000 J

1kJ = 1000 J

1 mol = atoms/particles/ molecules

Energy required to break 1 of Cl-Cl bond = E

Wave length of the radiation with energy E.

h = Planck's constant

c = speed of the light

The longest wavelength of radiation is 494.6 nm that will possess the energy to break the bond.

pure substance: iron,copper

impure substance: water,charcoal

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