Question

"For a perfectly crystalline substance at absolute zero, the entropy is zero."

State the law of thermodynamics for the given statement.

• A. Third law
• B. Zero law
• C. Second law
• D. None of these

Answer 1

The correct option is A Third law

The Zeroth Law of thermodynamics- If two systems are in thermal equilibrium respectively with a third system, they must be in thermal equilibrium with each other.

Second Law- In a natural thermodynamic process the sum of the entropies of the interacting thermodynamic systems increases.

Third Law-The entropy of a system approaches a constant value as the temperature approaches absolute zero.

Hence, option A is the right answer.