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Homework Help: Electron Binding Energy

  1. Oct 22, 2006 #1
    Ok, so the question is:

    A metal has a threshold wavelength for the onset of the photoelectric effect of 662 nm. What is the binding energy (kj/mol) of an electron to the metal surface.

    I used E=hv to get the photon energy, so is that the binding energy as well? If so, how do i convert it to kJ/mol, do i use avagadro's number?

    Any help is appreciated, thanks!
  2. jcsd
  3. Oct 22, 2006 #2


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    Gold Member

    Yes and yes! You have this one nailed.
  4. Oct 23, 2006 #3
    To convert it to kJ/mole you first convert the result from E=hv to joules and the multiply the result by Avogadros number.
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