A hot bar of iron glows a dull red. Using our simple model of a solid (see Figure 8.15), answer the following questions, explaining in detail the processes involved. The mass of one mole of iron is 56...

A hot bar of iron glows a dull red. Using our simple model of a solid (see Figure 8.15), answer the following questions,

explaining in detail the processes involved. The mass of one mole of iron is 56 grams.

(a) What is the energy of the lowest-energy spectral emission line? Give a numerical value.

(b) What is the approximate energy of the highest-energy spectral emission line? Give a numerical value.

(c) What is the quantum number of the highest-energy occupied state?

(d) Predict the energies of two other lines in the emission spectrum of the glowing iron bar.

(Note: Our simple model is too simple—the actual spectrum is more complicated. However, this simple analysis gets at some

important aspects of the phenomenon.)