Question

Calculate the wavelength of the radiation which would cause photochemical dissociation of a chlorine

molecule. The bond dissociation energy of Cl-Cl bond is 245 kJmol-1

.​

Answer 1

Explanation:

Cl - Cl bond energy = 245 kjmol

1 mole = 6.023×10^3 molecule = Avogadro's number

Cl - Cl bond energy per molecule

245×10^3/6.023×10^23. ( Cancelled Equation better understand)

Wave length HC/^. = 40×10^20j

^ = 6.62×10^34 ×3×10^8/4×10^20

4 .96×10^7 m

thanks dear friend

Answer 2

Answer:

Cl−Cl bond energy =241kJ/mol

1 mole =6.023×10

23

molecules = Avogadro's Number

Cl−Cl bond energy per molecule =

6.023×10

23

241×10

3

=4×10

−19

J

Wavelength is given by

λ

hc

=4×10

−19

J

⇒λ=

4×10

−20

6.62×10

−34

×3×10

8

=4.96×10

−7

m

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