Post a New Question

Chemistry

posted by .

The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV.
(a) At what wavelength does this occur and what is the energy difference in kJ mol-1 between the ground and excited states? Show your working in each case.
(b) If the degeneracy of the ground state and the excited state is 1, calculate N* / N0 at 2,000 K and 8,000 K.

I barely understand this

  • Chemistry -

    a)Convert 10.2 ev to joules.
    E = hc/wavelength.
    You know E (joules) and h and c, calculate wavelength in meters. The 10.2 ev is the energy difference per photon, you want a mole of photons for kJ/mol.

    b) I don't understand.
    BTW, we like for you to use the same screen name for your posts. It helps us keep people straight.

  • Chemistry -

    If a 30.0L tank of laughing gas contains 2.74 moles of N2O at 25 degrees C what is the pressure (atm) in the tank?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. CHEM

    The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV. (a) At what wavelength does this occur and what is the energy difference in kJ mol-1
  2. chemistry

    The electron from a hydrogen atom drops from an excited state into the ground state. When an electron drops into a lower-energy orbital, energy is released in the form of electromagnetic radiation. Part A: How much energy does the …
  3. Chemistry - College

    The ionization energy of a certain element is 472 kJ/mol. However, when the atoms of this element are in the first excited state, the ionization energy is only 166 kJ/mol. Based on this information, calculate the wavelength of light …
  4. physics

    A monochromatic light beam with energy 204eV is used to excite the Be+3 (H –like atom with Z=4) from its ground state to some excited state m. Neglect the finite nuclear mass correction. a) Find the quantum number m of this excited …
  5. Chemistry

    The hydrogen atomic emission spectrum includes a UV line with a wavelength of 92.3 nm. Is this line associated with a transition between different excited states or between an excited state and the ground state?
  6. Physics

    A hydrogen atom in an excited state emits a Balmer beta photon followed by a Lyman alpha photon. The electron decay from: the first excited state to the ground state, the second excited state to the ground state, the third excited …
  7. physics

    A hydrogen atom in an excited state emits a Balmer beta photon followed by a Lyman alpha photon. The electron decayed from the third excited state to the first excited state to the ground state. True or False.
  8. Chemistry

    An electron is excited from the n=1 ground state to the n=3 state in a hydrogen atom. Which of the following statements are true?
  9. Physics

    A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 5 excited state. The atom returns to the ground state by emitting two photons, one in dropping to n = 4 state, and one in further dropping …
  10. Chemistry

    A hydrogen atom in one of its excited states ha an energy of -1.5129^20 J. What is the frequency of radiation is emitted when the atom relaxes down to its ground state?

More Similar Questions

Post a New Question