PROBLEMS FOR PRACTICE
1. What is the energy in kcal of one mole of photons of 2573 A wavelength?
2. Calculate the energy of one photon of light of 2450 A wavelength. Will it be able to dissociate a bond in a diatomic molecules which absorbs this photon and has a bond energy equal to 95 kcal per mole?
Planck’s constant (ft) = 6.626 • 10*27 erg s molecule*1 Velocity of light (c) = 3 • 1010 cm sql
Avogadro’s number (N) = 6.02 • 1023
flint: Calculate the energy of the photon. If this energy is greater than that required to break the bond (bond energy), dissociation of the bond will happen.
3. Calculate the value of an einstein of energy in electronvolts for a radiation of 3 • 101S sql
frequency.
4. Calculate the value of the einstein corresponding to radiation of 6000 A wavelength.
5. Find the value of an einstein of energy for radiation of 4240 A wavelength.
PROBLEMS FOR PRACTICE
1. What is the energy in kcal of one mole of photons of 2573 A wavelength?
2. Calculate the energy of one photon of light of 2450 A wavelength. Will it be able to dissociate a bond in a diatomic molecules which absorbs this photon and has a bond energy equal to 95 kcal per mole?
Planck’s constant (ft) = 6.626 • 10*27 erg s molecule*1 Velocity of light (c) = 3 • 1010 cm sql
Avogadro’s number (N) = 6.02 • 1023
flint: Calculate the energy of the photon. If this energy is greater than that required to break the bond (bond energy), dissociation of the bond will happen.
3. Calculate the value of an einstein of energy in electronvolts for a radiation of 3 • 101S sql
frequency.
4. Calculate the value of the einstein corresponding to radiation of 6000 A wavelength.
5. Find the value of an einstein of energy for radiation of 4240 A wavelength.
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10–19 J?
