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Vishrant Vasavada Grade: 11
        Iodine Molecue dissociates into atoms after absorbing light of 4500 A. If oone quantum of radiation is absorbed by each molecule, calculate K.E. of iodine atoms.
7 years ago

Answers : (1)

deeksha sharma
40 Points
										

WAVELTH=4500*10-10 m


energy=hc/wavelength=6.62*10-34 *3*108 /4500*10-10 =4.4*10-19 J


half of this energy goes to each atom i.e. 2.2*10-19 J


bond energy of iodine= 240kj/mol = 3.9*10-19 J/atom


for one atom=1.95*10-19 J


ke of iodine atoms= (2.2-1.95)*10-19 J =0.25*10-19 J=2.5*10-20 J

7 years ago
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