AP Chemistry

posted by .

A mixture of argon and mercury vapor used
in advertising signs emits light of wavelength 610 nm.
Calculate the energy change resulting from
the emission of 1.00 mol of photons at this wavelength.
Answer in units of kJ/mol.

  • AP Chemistry -

    Use E=hc/lambda to calculate the energy (in J).

    This is the energy of one photon. There are 6.02 x 10^23 particles per mole.

    So energy changes is

    E x 6.02 x 10^23 J/mole

    or

    E x 6.02 x 10^20 kJ/mole

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Electricity

    The best answer is c, but a is also true if the wavelength of the light is chosen correctly. The intensity of the light does not determine the emission of the electrons, the wavelength (energy of light photons) is what determines. …
  2. Chemistry

    I need help with these two problems: 1.The H-Cl bond has a frequency of vibration of 8.662 multiplied by 10^13 Hz. What wavelength (in µm) corresponds to that frequency?
  3. Photon Energy

    How much energy is contained in 1 mol of each of the following?
  4. Chemistry

    Suppose that a PES experiment is performed in which mercury vapor is irradiated with ultraviolet light of wavelength 58.4 nm. Energy of a photon of this light is 21.2 eV. Write an equation that shows the process corresponding to the …
  5. chemistry

    Calculate the energy in joules per photon of red light having a wavelength 655 nm. What is the energy of 1 mol of these photons?
  6. Chemistry

    Calculate the energy in kJ/mol of a mol of photons in the ultra-violet region of the electromagnetic spectrum that has a wavelength of 2.88 × 10-7 m. Express answer in scientific notation. I got 4.16 * 10^8 but the correct answer …
  7. Chemistry

    What is the magnitude of the energy change associated with the emission of one mole of photons of light* with this wavelength?
  8. Chemistry

    Calculate the wavelength of light if 1.50 mol of photons has an energy of 125 kJ. 6.02x10^23 things=1.00 mol(things) c=3.00x10^8 m/sec h=6.626x10^-34 J sec
  9. Science

    1.Infrared radiation has wavelengths ranging from about 800 nm to 1 mm. What is the frequency of radiation of wavelength 970 nm?
  10. Chemistry- Dr. Bob

    Question 1 Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 1014 Hz. A) 704 nm B) 158 nm C) 466 nm D) 633 nm E) 142 nm My answer: D.633 nm Question 2 How many photons are contained …

More Similar Questions