Fall 20
10
CH301 Ho mework 13a—Problems for Statistical Thermodynamics Lecture
1. Two quick ideas that make math with statistical thermodynamics a lot simpler:
a) What is the amount of energy for Avagadro’s number multiplied by Boltzman’s constant? What is the famous name
of this value?
b) Use what you know about log functions to simplify S=k lnW?
2.
Answer the question asked about internal motional energy for each of the systems listed:
The number of degrees of freedom in a H atom in benzene?
The number of degrees of freedom in a benzene molecule?
The number of translational modes of motion in a molecule of benzene?
The number of rotational modes of motion in molecule of benzene?
The number of vibrational modes of motion in a molecule of benzene?
The number of degrees of freedom in 10 molecules of benzene?
The total internal motional energy in 10 molecules of benzene?
The total non
‐
vibrational motional energy in 10 molecules of benzene?
The total vibrational energy in 10 molecules of benzene?
The total vibrational energy in a mole of benzene?
The total translational energy in 10 moles of benzene?
The number of degrees of freedom in 10 molecules of carbon monoxide?
The number of degrees of freedom in a O atom in carbon monoxide?
The number of translational modes of motion in a molecule of carbon monoxide?
The number of rotational modes of motion in molecule of carbon monoxide?
The number of vibrational modes of motion in a molecule of carbon monoxide?
The total internal motional energy in 10 molecules of carbon monoxide?
The total non
‐
vibrational motional energy in 10 molecules of carbon monoxide?
The total vibrational energy in 10 molecules of carbon monoxide?
The total vibrational energy in a mole of carbon monoxide?
The total translational energy in 10 moles of carbon monoxide?
3. Which of the following molecules would have no positional entropy at absolute zero?
H
2
CH
4
NH
3
BH
3
SF
6
H
2
O
CO
2
COCl
CH
3
F
I
3
‐
O
3
4. Which of the following molecules would have a positional entropy closest to zero?
H
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 Fall '10
 Laude
 Thermodynamics, Energy, Entropy, Heat, Carbon monoxide, total vibrational energy

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