Question

Third law of thermodynamics is only applicable for perfectly crystalline substances.

(a) true

(b) false

The question was posed to me during a job interview.

My question comes from Thermodynamics in section Thermodynamics of Chemistry – Class 11

Answer 1

Right option is (a) true

The explanation: We can define the third law of thermodynamics entropy of a perfectly crystalline substance at zero kelvin or absolute zero is taken to be zero, but this is not applicable if there is any Imperfection at 0 k, the entropy will be larger than 0.