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Homework Help: Energy and Light Frequency

  1. Nov 4, 2005 #1
    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
  2. jcsd
  3. Nov 4, 2005 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Looks good to me.
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