Negative heat capacity at phase-separation in macroscopic systems
Statistical Mechanics
2007-05-23 v1 Astrophysics
Nuclear Theory
Abstract
Systems with long-range as well with short-range interactions should necessarily have a convex entropy S(E) at proper phase transitions of first order, i.e. when a separation of phases occurs. Here the microcanonical heat capacity c(E)= -\frac{(\partial S/\partial E)^2}{\partial^2S/\partial E^2} is negative. This should be observable even in macroscopic systems when energy fluctuations with the surrounding world can be sufficiently suppressed.
Cite
@article{arxiv.cond-mat/0508455,
title = {Negative heat capacity at phase-separation in macroscopic systems},
author = {D. H. E. Gross},
journal= {arXiv preprint arXiv:cond-mat/0508455},
year = {2007}
}
Comments
2 pages, 1 figure, 1 table