The diatomic molecule can rotate about the x and z axes. Rotational J energy 6 - 21 E 15 E The energies of allowed states can CM 4 10E be calculated using Figure 42.5 Rotation of a Equation 42.6. diatomic molecule around its cen- - 6 Ej ter of mass. (a) A diatomic mole- cule oriented along the y axis. (b) Allowed rotational energies of a diatomic molecule expressed as multiples of E, = h²/I. 3E E E, = 0 b ENERGY
The diatomic molecule can rotate about the x and z axes. Rotational J energy 6 - 21 E 15 E The energies of allowed states can CM 4 10E be calculated using Figure 42.5 Rotation of a Equation 42.6. diatomic molecule around its cen- - 6 Ej ter of mass. (a) A diatomic mole- cule oriented along the y axis. (b) Allowed rotational energies of a diatomic molecule expressed as multiples of E, = h²/I. 3E E E, = 0 b ENERGY
Modern Physics
3rd Edition
ISBN:9781111794378
Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Chapter11: Molecular Structure
Section: Chapter Questions
Problem 11P
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Most of the mass of an atom is in its nucleus. Model the mass distribution in a diatomic molecule as two spheres of uniform density, each of radius 2.00 x 10-15 m and mass 1.00 x 10-26 kg, located at points along the y axis as in 42.5a, and separated by 2.00 x 10-10 m. Rotation about the axis joining the nuclei in the diatomic molecule is ordinarily ignored because the first excited state would have an energy that is too high to access. To see why, calculate the ratio of the energy of the first excited state for rotation about the y axis to the energy of the first excited state for rotation about the x axis.
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