units for entropy with Boltzmann's constant


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Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

units for entropy with Boltzmann's constant

Postby Savannah Mance 4G » Thu Feb 20, 2020 6:19 pm

When your using the entropy equation with delta S= KblnW the units that W converts to is J/s but I was confused because if you use the Kb the units cancel to leave 1/K*s. Aren't the units for entropy supposed to be J/K?

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

Re: units for entropy with Boltzmann's constant

Postby Justin Seok 2A » Thu Feb 20, 2020 6:35 pm

I believe that boltzmann's constant is already in J/K, so I would assume that because the equation involves ln W, the units of W are not involved in calculations, thus leaving the units of boltzmann's constant, J/K, the same for the product.

Chris Tai 1B
Posts: 102
Joined: Sat Aug 24, 2019 12:16 am

Re: units for entropy with Boltzmann's constant

Postby Chris Tai 1B » Fri Feb 21, 2020 10:51 pm

When W is Watts, the units are J/s; however, when W is the degeneracy, I don't really think there are units for it. This is definitely confusing because Watts are symbolic of units, whereas W in the context of entropy is symbolic of entropy. Hence, this makes sense, because if Boltzmann's constant is in J/K, and W doesn't have units, then the units of entropy = J/K = J/K.


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