Atomic StructureEasy
Question
Bond dissociation on energy of Br2 is 200kJ/mole. The longest wavelength of photon that can break this bond would be (NA × hc = 0.12 J)
Options
A.6.0 × 10–5 m
B.1.2 × 10–5 m
C.6.0 × 10–7 m
D.1.2 × 10–7 m
Solution
$E = n.\frac{hc}{\lambda} \Rightarrow 200 \times 10^{3} = \frac{N_{A} \times hc}{\lambda} = \frac{0.12}{\lambda}$
$\therefore\lambda = 6 \times 10^{- 7}\text{ m}$
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