The internal energy of a systemANone of theseВis the sum of the rotational, vibrational, and translational energies of all of its componentsrefers only to the energies of the nuclei of the atoms of the component moleculesDis the sum of the kinetic energy of all of its componentsE) is the sum of the potential and kinetic energies of the components

Internal energy of system is denoted by U.

Answered: The internal energy of a system A None…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 57AP

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At temperature T, the internal energy of 1mol rigid diatomic molecules is =......
Explain whether you will expect a highr or lower internal energy for a mono-atomic molecules such as Ar compared to the multi-atomic molecules having the same molecular weight, Assume that the two molecules under the same temperature and pressure.
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Calculate the vibrational, rotational, and translational contributions to the constant volume heat capacity (Cv) for 14N2 at 298 K. Assume this represents the high temperature limit for rotational energy and low temperature limit for vibrational energy. Given that Cv=20.81 J/K·mol for N2, state which type or types of energy contribute most to Cv for N2 and explain why those types of energy contribute most.
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[References) The vibrational temperature of a molecule prepared in a supersonic jet can be estimated from the observed populations of its vibrational levels, assuming a Boltzmann distribution. The vibrational frequency of CuBr is 9.44×1012 s1, and the ratio of the number of molecules in the n = 1 state to the number in the n = 0 state is 2.59x10 2. Estimate the vibrational temperature under these conditions. (Enter your answer to three significant figures.) K
This problem explores the vibrational and rotational energy levels of the hydrogen halides. Experimental data are given below. Hydrogen halides kf (kg/s²) R (pm) HF 970.0 91.7 HCI 480.0 127.5 HBr 410.0 141.4 HI 320.0 160.9 For one mole of each HF, determine the following quantities. ΔΕ1Ο 8.29 x10-20 J b. The number of vibrational energy levels occupied at 300 K j = 2 levels c. The spacing between the two lowest rotational energy levels 7.73 x10-32 ΔΕ10 J Incorrect d. The number of rotational energy levels occupied at 300 K 5 j = levels Incorrect
18. Which of the following is the definition of internal energy of a system? a.it is the sum of the kinetic energy of all of its components b.it is the sum of the rotational, vibrational, and translational energies of all of its components c.lt refers only to the energies of the nuclei of the atoms of the component molecules d.It is the sum of the potential and kinetic energies of the components
Consider the rotational temperatures of the following hetero diatomic molecules: θr(CO) = 2.1 K, θr(HF) = 30.2 K. In which case would the classical approximation be accurate? Justify your answer.

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