## W=2^NA

Boltzmann Equation for Entropy: $S = k_{B} \ln W$

Annalyn Diaz 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### W=2^NA

I understand Avogadro’s number can be used when calculating degeneracy, but I’m confused as to when we would use it. Can someone clarify that please?

Mona El Masri 1F
Posts: 34
Joined: Fri Sep 28, 2018 12:20 am

### Re: W=2^NA

When you have 1 mole of a substance

jessicahe4Elavelle
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 1 time

### Re: W=2^NA

The NA represents the number of molecules or atoms in the system, so if there are 2 molecules of C02, for example, the NA would be 2. If you have one mole of CO2, the amount of molecules of CO2 is given by avogadro's number so NA would be Avogadro's number.

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

### Re: W=2^NA

NA is the number of particles per mole. For example, if the problem gives us mols to work with, we know that the degeneracy W=(number of possible positions of an atom)^(number of moles x Avogadro's number). However, if you are given particles to work with, W=(number of possible positions of an atom)^(number of particles).

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