Degeneracy (W)  [ENDORSED]

isochoric/isometric:
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Alexia Joseph 2B
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Degeneracy (W)

Postby Alexia Joseph 2B » Sat Jan 27, 2018 8:48 pm

Can someone quickly explain the concept of/meaning of degeneracy?

Nisarg Shah 1C
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Re: Degeneracy (W)

Postby Nisarg Shah 1C » Sat Jan 27, 2018 10:24 pm

Degeneracy is the number of ways of achieving a given energy state, and is directly related to entropy using the equation Dr. Lavelle described in class with Boltzmann's constant. Gas has a higher degeneracy than a liquid or solid, because its molecules can exist in multiple states because the intermolecular interactions of a gas are much less, so its molecules are not as a rigid as in a liquid or solid. Therefore, a gas has higher entropy.

Rachel Formaker 1E
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Re: Degeneracy (W)

Postby Rachel Formaker 1E » Sat Jan 27, 2018 10:25 pm

Degeneracy is the number of possible states that a system can have.

For example, if one particle can be in one of two sides of a flask (similar to the example in class) the degeneracy is W=2 because the system has two possible states (the particle on either side of the flask).

An equation for degeneracy of a 2-state system is W=2N, where N is the number of objects in the system.

The base of the equation can be modified to fit the number of possible states.
For example, in a 3-state system (the object can be in one of 3 possible places), W=3N.

So the base of the equation is equal to the number of states in the system, and N is equal to the number of objects in the system.

Fatima_Iqbal_2E
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Re: Degeneracy (W)

Postby Fatima_Iqbal_2E » Sat Jan 27, 2018 10:50 pm

In lecture, Dr. Lavelle describes degeneracy as the number of ways that a given energy state could be achieved. You could find this number by using W=2^N if you had a 2-State system, 3^N if you had a 3-State system, etc.

PeterTran1C
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Re: Degeneracy (W)

Postby PeterTran1C » Mon Jan 29, 2018 11:45 pm

Degeneracy, like previously stated, is the number of states a system can have. The more states, the higher its degeneracy. Moreover, it can be seen that the more complex a molecule is, the higher its degeneracy as well.

Magdalena Palavecino 1A
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Re: Degeneracy (W)

Postby Magdalena Palavecino 1A » Sat Feb 10, 2018 1:09 pm

I have seen some problems in which W also sometimes is calculated using Avogadro's number. When would this be the case instead of doing 2^molecules in the system?

Chem_Mod
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Re: Degeneracy (W)  [ENDORSED]

Postby Chem_Mod » Sat Feb 10, 2018 2:26 pm

Magdalena Palavecino 1A wrote:I have seen some problems in which W also sometimes is calculated using Avogadro's number. When would this be the case instead of doing 2^molecules in the system?


When you have n moles.
Using a similar example I did in class:

4 moles of CO would have a residual entropy of: S = k ln W where W = 24 x Avogadro's number

Dang Lam
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Re: Degeneracy (W)

Postby Dang Lam » Mon Feb 12, 2018 11:11 pm

Chem_Mod wrote:
Magdalena Palavecino 1A wrote:I have seen some problems in which W also sometimes is calculated using Avogadro's number. When would this be the case instead of doing 2^molecules in the system?


When you have n moles.
Using a similar example I did in class:

4 moles of CO would have a residual entropy of: S = k ln W where W = 24 x Avogadro's number

So to clarify, when the question gives us a certain "# moles of molecules" we have to multiply by Avogadro's number to find the # of particles?

Angela 1K
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Re: Degeneracy (W)

Postby Angela 1K » Tue Feb 13, 2018 6:09 pm

Yes! As seen through stoichiometry.


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