Question: The energy required to separate a hydrogen molecule into its individual atoms is 104.2 kcal per mole of H2. (a) If the dissociation energy for

The energy required to separate a hydrogen molecule into its individual atoms is 104.2 kcal per mole of H2.

(a) If the dissociation energy for a single H2 molecule is provided by one photon, determine its frequency and wavelength.

(b) In what region of the electromagnetic spectrum does the photon found in part (a) lie? (Refer to the spectrum shown in Figure 25-12.)

Figure 25.12

Frequency (Hz) 108 1012 1010 1014 1016 1018 Microwave Visible 1020 Ultraviolet 1022 Gamma rays Radio/TV Wavelength (m) 102 Infrared X-rays 10 2 10 6 104 108 10-12 10-10

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