All Questions
Tagged with degrees-of-freedom vibrations
6 questions
29
votes
2
answers
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In counting degrees of freedom of a linear molecule, why is rotation about the axis not counted?
I was reading about the equipartition theorem and I got the following quotations from my books:
A diatomic molecule like oxygen can rotate about two different axes. But rotation about the axis down ...
user36790
8
votes
3
answers
6k
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Extra vibrational mode in linear molecule
When calculating the number of vibrational modes for a molecule, the formulas differ for linear $(n = 3N - 5)$ and non-linear $(n = 3N - 6)$ molecules, where $n$ is number of modes and $N$ is number ...
- 491
3
votes
1
answer
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Degrees of freedom in a diatomic molecule [duplicate]
We know that a monatomic compound can only have 3 degrees of freedom as we can consider it to be a point mass. However now that we consider a diatomic molecule, there are 3 degrees of freedom in ...
- 427
1
vote
1
answer
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Why does water have 9 degrees of freedom and that too all vibrational?
How does water has 9 degrees of freedom? If it can vibrate about all three atoms then why can't a diatomic molecule also have 2 instead of 1 possible vibrations?
I haven't studied quantum mechanics ...
- 644
5
votes
2
answers
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Actual Degree of Freedom of Diatomic Molecule
Ok, I have 2 very different values for degree of freedom(DOF) of diatomic molecules arising due to the difference in the vibrational DOF of the diatomic molecules.
According to this DOF wiki page:-
...
- 335
3
votes
1
answer
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2 Extra Degree of Freedom in Linear Triatomic Molecules?
Ok, there is a bit problem in understanding Degree of Freedom of Linear Molecules specially of Triatomic Linear Molecules.
See, the DOF in general is given as $f=3N-k$.
Here,
N=Number of atoms in a ...
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