Negative heat capacity at phase-separation in macroscopic systems

D. H. E. Gross

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Negative heat capacity at phase-separation in macroscopic systems

D. H. E. Gross

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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.

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BibTeX RIS

D. H. E. Gross. 2005-08-19. Negative heat capacity at phase-separation in macroscopic systems. https://arxiv.org/abs/cond-mat/0508455

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