Absorption spectra for molecules are more complex than atomic spectra because: C (a) Molecular species have side reactions C (b) Atomic species do not absorb light C (c) The number of energy states of molecules is enormous when compared with the number of energy states for isolated atoms. Explain the phenomenon of absorption / emission of light by a molecule and describe the processes in terms of energy levels. How this information can be used for obtaining analytical information on an analyte of interest?

Absorption spectra for molecules are more complex than atomic spectra because: C (a) Molecular species have side reactions C (b) Atomic species do not absorb light C (c) The number of energy states of molecules is enormous when compared with the number of energy states for isolated atoms. Explain the phenomenon of absorption / emission of light by a molecule and describe the processes in terms of energy levels. How this information can be used for obtaining analytical information on an analyte of interest?

Physical Chemistry

2nd Edition

ISBN:9781133958437

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

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

Chapter15: Introduction To Electronic Spectroscopy And Structure

Section: Chapter Questions

Problem 15.69E

See similar textbooks

Similar questions

Spectroscopy deals with differences in energy between levels. Derive an expression for E, the difference in energy, between the two molecular orbitals of H2+.
Calculate the energy for vacancy formation in silver, given that the equilibriumnumber of vacancies at 800°C is 3.6x1023 m-3 . The atomic weight and density(at 800°C) for silver are, respectively, 107.9 g/mol and 9.5 g/cm3. (NA= 6.023x1023 atoms/mol)
A line in the Balmer series of the spectrum of atomichydrogen is observed at 23 032 em·'. What is the quantumnumber of the energy level?
ThefundamentalinfraredabsorptionthatindicatesthepresenceofaC-Hstretchingvibrationina molecule occurs at wavelengths near 3.4 x 10-6m. Use this information to estimate the force constant of the C-H bond. If the fundamental vibration of an N-H bond stretch occurs near the wavelength 2.9 x 10-6m. Which of the two bonds would you consider stronger: C-H or N-H? Explain your answer explicitly.
Describe the lowest excited state of an insulating solid and brieflycomment on its relevance to quantum dots
In a 1.10 cm thick cuvette, a 0.5 M solution of a substance absorbs 55% of the incident radiation of wavelength 5985 Å (at which). Calculate the concentration of a solution that absorbs 75% under the same conditions. The solvent is transparent in both cases.
The 3N-6 vibrational modes of a molecule can be sub-subdivided into three general types ofdeformations.(i) Define these and draw their approximate potential energy functions. (ii) Order the three types. Start with the one requiring the least energy to animate.(iii) Where are anharmonic modes generally located in the energetic ordering relative toother modes and what other name(s) are they know by? (iv) Discuss the significance of anharmonic modes and why accurately characterisingthem is key to precise energetic determinations and to accurately modellingspecificity, selectivity and functionality in chemical phenomena.
Why it is not possible to obtain blue phosphorescence from a transition that initially absorbs blue light. Also suggest why phosphoresence spectra are sometimes better for identifying useful electronic transition for possible laser transition than are flourescence spectra.
hydrogen molecule absorbs ultraviolet radiation in a transition from its 1Σg+ ground electronic state to an excited state that is energetically close to a dissociative 1Σu+ state. The absorption band has a relatively large experimental linewidth. Account for this observation.
When CHCl3 is cooled to liquid N2 temperatures (frozen) and a Raman spectrum taken, some of the peaks split into a variety of multiplets. Give a rational explanation for this behaviour. Refer to Cl35 and Cl37 isotopes
What are the conditions for a molecule to be Raman active, IR active.
which of the following is a reason electronic spectra of molecules typically contain broad peaks? a. all transtions are allowed, b. excited states have finite lifetimes, c. the molecules are stationary, d. all transitions are forbidden