1.

Identify the correct statements regarding entropy.

Answer»

At absolute zero temperature, the entropy of all CRYSTALLINE substances is not taken to be zero
At absolute zero temperature, the entropy of a PERFECTLY crystalline SUBSTANCE is positive.
At absolute zero temperature, entropy of a perfectly crystalline substance is taken to be zero.
At `0^@C` , the entropy of a perfectly crystalline substance is taken to be zero.

Solution : This is the statement of third law of thermodynamics. In a perfect crystal, at absolute zero temperature, each constituent of LATTICE must have the lowest energy, so it LEADS to perfect order, therefore, zero entropy.


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