It has been found that gaseous iodine molecule just dissociates into iodine atoms after absorption of light at wavelength 4995 A°. The energy required to dissociate 1 mole of iodine molecules is
(1) 52.2 kcal / mole
(2) 93.4 kcal /mole
(3) 63.4 Kcal/mole
(4) 57.3 Kcal/mole
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Answer : The correct option is, (4) 57.3 Kcal/mole
Explanation :
Formula used :
where,
E = energy = ?
h = Planck's constant =
c = speed of light =
= wavelength =
Now put all the given values in the above formula, we get the energy.
The energy required for 1 mole of iodine molecules will be,
Therefore, the energy required for 1 mole of iodine molecules is, 57.3 Kcal/mole