Question

Anharmonic oscillator. Hydrogen bromide, H8Br, vibrates approximately according to a Morse potential VM(r) = Dell-e-ck/2De)i/2(r-re) , with De= 4.810 eV, = 1.4144 A, and k= 408.4 N m-1. With a0-Vk/a, the energies of the stationary states in a Morse potential are En (n + 1/2)2. (A) On the same graph, plot the Morse potential and the harmonic potential as a function of bond length (from 0.7 to 2 %). Use the software of your choice to generate this plot. (B) Describe the differences. Why is the Morse potential typically considered a better approximation than the harmonic potential? (C) Calculate the energy (in eV) and wavenumber in cm)of the absorptive transition n -1(the fundamental transition), for both the Morse and the harmonic potential. (D) Explain the differences you see between the two models

Answer 1

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