17-42. The vibrational frequency of NaCl(g) is 159.23 cm. Calculate the molar heat capacity,Cy, at 1000 K. (See Equation 17.27.)17-43. The energies and degeneracies of the two lowest electronic states of atomic iodine arelisted below.Energy/cm Degeneracy47603.22What temperature is required so that 2% of the atoms are in the excited state?

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17-42. The vibrational frequency of NaCl(g) is 159.23 cm. Calculate the molar heat capacity, Cy. at 1000 K. (See Equation 17.27.)

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17-42. The vibrational frequency of NaCl(g) is 159.23 cm. Calculate the molar heat capacity,
Cy, at 1000 K. (See Equation 17.27.)
17-43. The energies and degeneracies of the two lowest electronic states of atomic iodine are
listed below.
Energy/cm Degeneracy
4
7603.2
2
What temperature is required so that 2% of the atoms are in the excited state?

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