Year: 2001
Type: article
Abstract: The constant-volume heat capacity, CV(T,ρ), 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 CV(T,ρ)—which would point to non-Ising-type criticality. The strong qualitative difference between CV 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, CV/V, the finite-size results for the two systems display qualitatively similar behavior on near-critical isotherms.
Source: The Journal of Chemical Physics
DOI: 10.1063/1.1359769
Institutions: University of Maryland, College Park, Princeton University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2154228421