The entropy of a perfect crystalline substance at absolute zero is given by: (20

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Question: The entropy of a perfect crystalline substance at absolute zero is given by: (2021)

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Correct Answer: 0 J/K

Exam Year: 2021

Solution:

According to the third law of thermodynamics, the entropy of a perfect crystalline substance at absolute zero is exactly zero.

The entropy of a perfect crystalline substance at absolute zero is given by: (2021)

The entropy of a perfect crystalline substance at absolute zero is given by: (2021)

Step 1: Understand what entropy is. Entropy is a measure of disorder or randomness in a system.
Step 2: Learn about absolute zero. Absolute zero is the lowest possible temperature, 0 Kelvin, where all molecular motion stops.
Step 3: Familiarize yourself with the third law of thermodynamics. This law states that as the temperature of a perfect crystalline substance approaches absolute zero, its entropy approaches zero.
Step 4: Conclude that at absolute zero, a perfect crystalline substance has no disorder, meaning its entropy is exactly zero.

Third Law of Thermodynamics – States that the entropy of a perfect crystalline substance approaches zero as the temperature approaches absolute zero.