A mixture of argon and mercury vapor used in advertising signs emits light of wavelength 680 nm. Calculate the energy change resulting from the emission of 1.00 mol of photons at this wavelength.

1. 272.058 2. 206.388 3. 244.297

4. 202.89

5. 239.411 6. 285.013 7. 173.486 8. 234.716 9. 187.04

10. 176.037

Answer in units of kJ/mol. Answer in units

of kJ/mol.