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3rd law of thermodynamics

Posted: Sun Feb 23, 2020 3:27 pm
by Riya Sood 4G
According to the third law of thermodynamics, the entropy of a pure crystalline substance at 0K is 0. Does this mean that the substance is in a solid state at 0K?

Re: 3rd law of thermodynamics

Posted: Sun Feb 23, 2020 4:00 pm
by Christine Honda 2I
Yes, I believe the substance has to be in a solid state. It must be a perfect crystalline to have zero disorder and therefore have zero entropy.

Re: 3rd law of thermodynamics

Posted: Sun Feb 23, 2020 7:53 pm
by Chris Charton 1B
Yes, at 0K atoms cease to move, have zero entropy and are in a solid state. 0K is theoretical, it is not actually possible to reach.

Re: 3rd law of thermodynamics

Posted: Sun Feb 23, 2020 9:52 pm
by Matthew Chan 1B
Yes, since at 0K atoms can't move, so there is no disorder since there is no other possible state/position that the atoms could be in, which means zero entropy.