Inspection of the thermodynamic tables in the back of the text reveals that many molecules have quite similar constant volume heat capacities.

a. The value of C_{V, m} for Ar (g) at standard temperature and pressure is 12.48 J mol^–1 K^–1, identical to gaseous He (g). Using statistical mechanics, demonstrate why this equivalence is expected.

b. The value of C_{V, m} for N₂ (g) is 20.81 J mol^–1 K^–1. Is this value expected given your answer to part (a)? For N₂, ν̅ = 2359 cm^–1 and B = 2.00 cm^–1.