The heat capacity of the restricted primitive model electrolyte
Abstract
The constant-volume heat capacity, C_V(T, rho), of the restricted primitive model (RPM) electrolyte is considered in the vicinity of its critical point. It is demonstrated that, despite claims, recent simulations for finite systems do not convincingly indicate the absence of a divergence in C_V(T, rho)--which would point to non-Ising-type criticality. The strong qualitative difference between C_V for the RPM and for a Lennard-Jones fluid is shown to result from the low critical density of the former. If one considers the theoretically preferable configurational heat-capacity density, C_V/V, the finite-size results for the two systems display qualitatively similar behavior on near-critical isotherms.
Keywords
Cite
@article{arxiv.cond-mat/0011359,
title = {The heat capacity of the restricted primitive model electrolyte},
author = {Erik Luijten and Michael E. Fisher and Athanassios Z. Panagiotopoulos},
journal= {arXiv preprint arXiv:cond-mat/0011359},
year = {2009}
}
Comments
5 Pages, including 5 EPS figures. Also available as PDF file at http://pallas.umd.edu/~luijten/erikpubs.html