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Energy and Light Frequency

by Soaring Crane
Tags: energy, frequency, light
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Soaring Crane
#1
Nov4-05, 06:39 PM
P: 484
The absorption of light of frequency 1.16 x 10^11 Hz is required for CO molecules to go from the lowest rotational energy level to the next highest rotational energy level. Determine the energy for this transition in kJ/mol. h = 6.626 x 10-34 J s
a. 7.69 x 10-23 kJ/mol
b. 949 kJ/mol
c. 46.3 kJ/mol
d. 0.0463 kJ/mol
E = hv
= (1.16*10^11 Hz)(6.626*10^-34 J*s)
= 7.686 *10^-23 J = 7.69*10^-26 kJ* (6.02*10^23 molecules/ 1 mol) = 0.04629 kJ/mol
Thanks.
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Doc Al
#2
Nov4-05, 06:55 PM
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P: 41,305
Looks good to me.


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