What Is The Third Law Of Thermodynamics? (2024)

Third law of thermodynamics:

• “The third law of thermodynamics states that the entropy of a perfectly ordered crystalline substance is zero at absolute zero of the temperature.”
• At a temperature of zero Kelvin, the following phenomena can be observed in a closed system:

• The system does not possess any heat.
• All the atoms/molecules in the system are at their lowest energy points.

Significance of third law of thermodynamics:

• “The third law provides an absolute reference point for the determination of entropy at any other temperature.”
• A real-life example of the third law of thermodynamics is Steam/vapors of water are the gaseous forms of water at high temperatures as the molecules within steam are randomly moving, thus it will have high entropy.