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Homework Help: PLEASE HELP Ionization Energy Question

  1. Oct 11, 2005 #1
    PLEASE HELP!!! Ionization Energy Question

    Hello everyone,
    I am having some trouble with this question. If one of you could point me in the right direction i would be really grateful.

    1. Since the ionization process takes an electron from its ground state to the zero level of the energy scale, the ground state engery calculated for the electron of the hyrdrogen atom can be compared to the negative of its ionization engery. Use the equation E=-2.178E-18(z squared/n squared), for the energy of a valence level n to build an equation that can be used to calculate ionization energy of hydrogen in KJ/mol.

    I would assume that the ionization energy per mole would just be equal to the negative value of the first energy level divided by the number of moles but this is wrong.
    Any help would be GREATLY appreciated. Thanks
  2. jcsd
  3. Oct 11, 2005 #2


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    Plugging in z=1, n=1, you can find the IE of a single H-atom in Joules. How many H-atoms in a mole ? How many joules in a kilojoule ?
  4. Oct 11, 2005 #3
    OK. that makes some sense Gokul. Thanks alot for the help!
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