residual entropy T=0

[Summer de Vera 2C]

Hi! for residual entropy, it's defined as being the entropy of a sample at T=0 from the remaining positional disorder @ that temp, but I'm a bit confused as to what T=0 refers to. Because it's not deltaT=0, which means it's isothermal, and the units aren't defined (T=0 K/˚C). So what does this refer to?

[Christopher Anisi 2K]

I think the most important aspect of residual entropy is that it does not include the aspect of temperature and is only focused on the number of positions and orientations that the structure can take on.

[Alexa_Henrie_1I]

When absolute temperature equals zero (T=0), there is no thermal entropy (no movement). This means that residual entropy is based on the complexity and order of the molecule and its positions.