Suppose the wavenumber of the fundamental vibrational transition of 79Br81Br was measured to be 363.4cm-1. Calculate the force constant of the bond in SI units given the isotopic masses:(m(79Br) = 78.9183 amu, m(81Br) = 80.9163 amu).
Answer:__________________N m-1
Suppose the wavenumber of the fundamental vibrational transition of 79Br81Br was measured to be 363.4cm-1. Calculate...
Suppose that the wavenumber of the J = 1 ← 0 rotational transition of 1H79Br considered as a rigid rotor was measured to be 17.89 cm-1, what is (a) the moment of inertia of the molecule? Ans = _____ kg-m2 (b) the bond length? Ans = _____ Angstroms (Given the isotopic masses:(m(79Br) = 78.9183 amu, m(81Br) = 80.9163 amu)
What is the force constant of the bond (spring constant) of Br2 if the wavenumber of the fundamental vibrational transition takes the value given? Assume the vibrations of the molecule can be represented by a simple harmonic oscillator in this case. Use mass bromine = 79.904 . Please give your answer in SI units. w = 5.6471 x 10^2 cm-1
1. The fundamental vibration of 1H19F is at 3961.64 cm-1. Using the harmonic oscillator model, calculate the “force constant” of the bond (in N/m) and use this value to predict the fundamental frequency of both 2H19F and 1H18F in wavenumbers. Briefly explain why the fundamental frequencies are so different. (amu masses: 1H = 1.0078, 2H = 2.0140, 18F=18.0009, 19F=18.9984) 2. What is the fundamental frequency of the vibrational mode best described by the term “symmetric stretch”?
There are two main types of isotopes of Bromine in the nature, one is 79Br with the atomic mass of 79 amu, and another one is 81Br with the atomic mass of 81 amu. The force constant (k) of both the diatomic molecule H79Br and H81Br is 381 N/m. Assuming both molecules are harmonic oscillators. (a) Calculate the fundamental vibrational frequency (ν) of H79Br. Report your value in Hz. (b) Calculate the zero-point energy (E0) of H79Br. Report your value...
What is the approximate wavenumber in cm-1 of the fundamental absorption due to the stretching vibration of a C≡N group? Assume the force constant for a triple bond to be about 1.53×103 N/m.
2) The vibrational transition from the v = 0 state to the v = 1 state of the CO molecule is found to absorb at 1 = 4.6um. In which region of the spectrum this transition will be taken place? Calculate the vibrational frequency and the force constant for this molecule.
need # 4 or 5 o Vibrational spectroscopy of the NO molecule (with absorption at 1878 cm isotope masses of No14 and 0-16, respectively) reveals Assuming that this transition represents the energy spacing between vibrational energy levels, calculate the force constant of the bond Assuming that the "N"O molecule has a bond with the same force constant as in part a, predict the position (in cm) of the absorbance peak for this molecule. 1. a. b 2. Normalize the first...
Atkins' Physical C... PZE.4 The force constant for the bond in CO is 1857 Nm . Calculate the vibrational frequencies (in Hz) of 'C', 'C', C'80, and 'C'80. Use integer relative atomic masses for this estimate. harmonic the integra and then u 0. (b) Calc section). (c 297 P7E.5 In infrared spectroscopy it is common to observe a transition from the v=0 to v= 1 vibrational level. If this transition is modelled as a harmonic oscillator, the energy of the...
8. (32 points) Scientists have studied excited electronic states of molecules by a variety of experimental techniques. The following data were obtained for an excited electronic state of Mgo. rotational constant, B = 0.5014 cm vibrational constant, .= 632.5 cm a) At what energy (in cm) and wavelength (in um, where 1 um = 10 m) will the J = 6 to J - 7 rotational transition occur for this electronic state of Mgo? b) What is the value for...
The diatomic molecule boron nitride, 11B14N was studied by the spectroscopist Gerhard Herzberg in 1940. It was produced via a discharge involving boron trichloride and dinitrogen in the presence of helium. a) Given that the fundamental transition occurs at 1490.0 cm-1 and the first overtone at 2955.4 cm-1, determine the harmonic wavenumber and the anharmonicity. b) Given that the centrifugal distortion constant is 8.1 x 10-6 cm-1, determine the rotational constant of the molecule. State any approximations made. Ignore rotational-vibrational...