Home work Physical and Theoretical Chemistry IV

- Molecular Spectroscopy -

Discussion  Fr 14.6.2002 at 10:30,  HR30.1 (Hagenring 30)
http://www.pci.tu-bs.de/aggericke/PC4/Uebungen/



 

Home work 7       Spectra and molecular constants
 
 
 

Exercise 1:

Calculate the rotational energy levels of the OH molecule, when the bondlength is 97 pm.
What is the spectral region of the transitions between the rotational levels (ΔJ = ± 1)?.


Exercise 2:

12C16O molecules absorb microwave radiation at 3.84235 cm-1 and are promoted from J = 0 to J=1. For 13C16O an energy of 3.67337 cm-1 is required.
Calculate
    1. the bondlength of  12C16O,
    2. the relativ atomic mass of 13C
    M(12C) = 12,0000                     M(16O) = 15,9949


Exercise 3:

What is the energy (in wavenumbers) of the 1H35Cl ground state,  when the force constant k of the bond is 516 Nm-1.
What is the shift of energy in the case of  2H35Cl.

M(35Cl) = 34,969                     M(1H) = 1,008                     M(2H) = 2,014