Third law of thermodynamics

From RationalWiki

The third law of thermodynamics states that "as the temperature of the universe approaches zero, its entropy approaches a constant." As temperature approaches absolute zero, the number of quantum states available to the universe becomes smaller and smaller, eventually approaching one^[1]. The entropy of one state is zero, and so the third law therefore says that the "constant" that the entropy approaches is zero.

[edit] See Also

• Laws of thermodynamics

[edit] Notes

1. ↑ Spin degeneracy may lead to two possible states for the system, but then the entropy approaches ln(2), which is incredibly small compared to the entropy of a macroscopic system. It can still be said that the entropy approaches zero.

S T U B (The Pet Goat ate it)