Atomic Energy States and Line Spectra

The difference in energy, A2 i2, is related directly to the frequency (y, sec ) or wavelength (A, nm)4 of the absorbed quantum of radiation by the equation 

For chemical reactions, we usually express energy changes in kcal mole. For absorption of one quantum of radiation by each atom (or each molecule) in one mole, the energy change is related to A by 

Exercise 9-3 Calculate the energy in kcal mole-1 that corresponds to the absorption of 1 einstein of light of 589.3 nm (sodium D line) by sodium vapor. Explain how this absorption of light by sodium vapor may have chemical utility. 

Exercise 9-4 a. Use Equations 9-1 and 9-2 to calculate the wavelength in nm and energy in kcal of an einstein of radiation of radio-frequency energy in the broadcast band having v= 1 MHz (1 megahertz) = 106 sec-1 and knowing that the velocity of light is approximately 3 x 10s meters sec-1- 

9 Separation-and Purification Identification of Organic Compounds by Spectroscopic Techniques 

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