Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Calculate the energy per mole of photons in kilojoules that has a frequency of 8.21 x 1012 sec-1 .
Expert Solution
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Step 1
Since the frequency of each photon is given
And we know that the energy of photon is given by
E = hf
where E = energy of each photon
h = Planks constant = 6.626 X 10-34 Js
f = frequency of photon = 8.21 x 1012 sec-1
Hence substituting the values we get
E = energy of each photon = 6.626 X 10-34 X 8.21 x 1012 = 5.44 X 10-21 J = 5.44 X 10-24 KJ
Since 1 KJ = 1000 J
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