Question
Sat September 14, 2013 By: Keshav Sultania
 

If the energy difference between two electronic sates is 214.68Kj/mol, calculate the frequency of light emitted when an electron drops from the higher to lower states.

Expert Reply
Hanisha Vyas
Sat September 14, 2013
Planck's constant = 39.79 x 10-14 kJ mol-1
 
The frequency (n) of emitted light is related to the energy difference of two levels (DE) as-
 

?E = hv  or  v?E

                        h

 E = 214.68 kJ mol-1, h = 39.79 x 10-14 kJ mol-1

 

    v =    214.68 

         39.79X10-14

 

    v =    214.68 X 1014

                39.79

      = 5.39 x 1014 s-1  

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