6. In the IR spectrum of 1H19F, there is an intense band at 4138.52 cm-1. Calculate: a) the fundamental vibrational frequency of HF (in Hz). b) the period of the vibration (in sec) c) the force constant (in N/m) d) the zero-point energy of HF in kcal/mol e) Assume that vibrational force constants are independent of isotopic species. Calculate the relative energy separation for the lowest two vibrational levels 2D19F.

6. In the IR spectrum of 1H19F, there is an intense band at 4138.52 cm-1. Calculate: a) the fundamental vibrational frequency of HF (in Hz). b) the period of the vibration (in sec) c) the force constant (in N/m) d) the zero-point energy of HF in kcal/mol e) Assume that vibrational force constants are independent of isotopic species. Calculate the relative energy separation for the lowest two vibrational levels 2D19F.

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter14: Rotational And Vibrational Spectroscopy

Section: Chapter Questions

Problem 14.83E

See similar textbooks

Similar questions

What is the term symbol for the ground state of a Li, b Al,c Sc?
Consider HCN, which has three features in its IR spectrum: 946, 2380, and -1 3386 cm¹. (a) Sketch the motions of each normal mode and denote any degeneracies. (b) Assign each feature in the IR spectrum to a normal mode of the molecule. (c) Determine the zero-point energy of HCN.
3. If a hypothetic vibrational motion of a molecule can be described by Tvib = 2A1 + E, within the point group C4v, how many bands/peaks would you expect to see in its IR spectrum? Explain your reasoning. C, (4mm) E 2C, C, 20, 20. h = 8 1 1 1 1 x² + y', z2 A, 1 1 1 -1 -1 R_ B, 1 -1 1 1 -1 x² – y? B, 1 -1 1 -1 1 xy 2 -2 0 0 (x, y) (R, R) (zx, yz)
Beta-carotene is an organic compound with an orange color. The diagram above shows the ultraviolet spectrum of beta-carotene. Which of the following statements is true about the absorption bands in the spectrum?(see attached image) a.) The absorption band between 250250 and 320 nm320 ⁢⁢nm is due to transitions in electronic energy levels, and the absorption band between 380 and 520 nm is due to transitions in molecular vibrational levels. b.) The absorption band between 250 and 320 nm is due to transitions in molecular vibrational levels, and the absorption band between 380 and 520 nm is due to transitions in molecular rotational levels. c.) The two main absorption bands are associated with transitions in electronic energy levels. The band in the region corresponding to shorter wavelengths shows a lower absorbance than the band in the region corresponding to longer wavelengths. d.) The two main absorption bands are associated with transitions in molecular vibrational levels.…
A typical vibrational frequency for a cabonyl is 1600-1900 cm ¹. For carbon monoxide, is approximately 2180 cm ¹. Which of the following is a reasonable explanation for why is larger for CO than for R'-C(=O)-R. O The force constant for C=O is larger than that for C-O due to the larger bond multiplicity. The reduced mass for C=O is larger than that for C-O due to the larger bond multiplicity. The force constant for C=O is smaller than that for C-O due to the larger bond multiplicity. The reduced mass for C=O is smaller than that for C-O due to the larger bond multiplicity.
(a) Draw a rough schematic of the series of resonances corresponding to a vibrational transition for a diatomic. Label the P and R branches, explain what the difference is between them, and indicate what the spacing is between the resonance lines. (b) What is the main information about a diatomic molecule that one can obtain from vibrational and rotational transition frequencies (assuming that the reduced mass is known)?
4. a) The force constant of "Br2 is 300 Nm-1. Determine its vibrational energy (in Joules and eV), zero-point energy and vibrational frequency. b) The 1H17F (rigid type) has bond length 0.16nm. Determine its rotational constant in Joules, eV and cm-1.
9) The vibrational frequency of gaseous HCl occurs at 2885 cm¹ in the IR spectrum. What is the energy E, of this radiation in joules? a) 5.73 x 10-20 J b) 8.24 x 10-19 J c) 6.48 x 10-21 J d) 1.80 x 10-19 J
In the infrared spectrum of He79Br, there is an intense line at 2559 cm−1 . Calculate the force constant of He^79 Br and the period of vibration of He^79 Br.