Third Law of Thermodynamics

[Fatima_Iqbal_2E]

Could someone please explain what exactly the Third Law of Thermodynamics is? I remember going over it in lecture, but I don’t quite understand it.

[Matthew 1C]

in class it was said that the third law of thermodynamics says that the limit of S as the temperature approaches 0 Kelvin equals 0. What that says is that the entropy at 0 Kelvin is 0, so it is perfectly ordered material

[Adrienne Dang 1B]

yes, so it is basically defining absolute zero on the entropy scale and this is important because the entropy determined relative to this point is the absolute entropy.

[Tasnia Haider 1E]

The third law of thermodynamics states that for a perfect crystal at absolute zero, the entropy is also zero.

[Niyanta Joshi 1F]

Also, absolute zero is a theoretical concept. It may not be achieved experimentally. This is because from the second law of thermodynamics, we know that heat will spontaneously move from a warmer body to a cooler body, so the object that one tries to cool to absolute zero will try to take in heat from its surroundings.