Question

Are entropy values for substance grater than or equal to zero?

Answer 1

Unless there are exceptional circumstances, the entropy of any substance is `>0`.

Explanation:

The `"third law of thermodymamics"` states that `"the entropy of"` `"a perfect crystal at 0 K is ZERO.........."`

The law was formulated by Walther Nernst in 1906. Boltzmann later derived a statistical mechanical treatment that stated that `S=klnomega`, where `k="Boltzmann's constant"`, and `omega`, the number of microstates in the system. Since a perfect crystal is `"perfect"`, there is only the ONE microstate available for the system, and `ln(1)=0`.