Question

Using the rigid rotor model, calculate the energies in Joules of the first three rotational levels of HBr, using for its moment of inertia I-R2, with u mHm(mH mx) and equilibrium internuclear distance 1.63 Å. To put these energies into units that make sense to us, convert energy to kJ/mol. (Simply estimate atomic masses from the average atomic weights of the elements given in the periodic table). kJ/mol kJ/mol kJ/mol Think about how these sized energies compare with the typical amount of rotational energy a diatomic molecule possesses at room temperature, which is roughly RT -2.5 kJ/mol. This will tell you whether you expect the excited rotational levels you just computed will be populated at room temperature.

Answer 1