- #1

LCSphysicist

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- Homework Statement
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- Relevant Equations
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Does increase the size of the solid body increase its entropy? I was thinking about it using the Einstein model of solid.

S = k*lnΩ

Ω = (q+n-1)!/((q)!(n-1)!)

I am not sure how this question should be answer, i think if we talk about rigid bodies, the question don't even have sense, but about deformable bodies, technically increase its extension would not increase the entropy.

However, enlarge a body means to do work on it, that is, give it a additional energy.

Seeing by this way, if it would possible to enlarge a body and at the same time make it lost energy, in such way that the net energy change is zero, so we would end with a body/system greater than the one first, with the same entropy S = k*lnΩ.

Anyway maybe i am mixing quantum and classical mechanics in this topic, if this is the case, sorry, i don't know a lot quantum mechanics yet.

S = k*lnΩ

Ω = (q+n-1)!/((q)!(n-1)!)

I am not sure how this question should be answer, i think if we talk about rigid bodies, the question don't even have sense, but about deformable bodies, technically increase its extension would not increase the entropy.

However, enlarge a body means to do work on it, that is, give it a additional energy.

Seeing by this way, if it would possible to enlarge a body and at the same time make it lost energy, in such way that the net energy change is zero, so we would end with a body/system greater than the one first, with the same entropy S = k*lnΩ.

Anyway maybe i am mixing quantum and classical mechanics in this topic, if this is the case, sorry, i don't know a lot quantum mechanics yet.