On the Interpretation of Near-Critical Gas–Liquid Heat Capacities

This comment is in response to a comment by Sengers and Anisimov on the article “Gibbs density surface of fluid argon” that contradicts prevailing theory. It has not “been established experimentally that the thermodynamic properties of fluids satisfy scaling laws with universal critical exponents as...

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Bibliographic Details
Published in:International journal of thermophysics 2017-09, Vol.38 (9), p.1-7, Article 139
Main Author: Woodcock, Leslie V.
Format: Article
Language:English
Subjects:
Argon
Asymptotic properties
Classical Mechanics
Condensed Matter Physics
Critical point
Divergence
Exponents
Geophysics
Industrial Chemistry/Chemical Engineering
Phase transitions
Physical Chemistry
Physics
Physics and Astronomy
Scaling laws
Specific heat
Thermodynamic properties
Thermodynamics
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Summary:This comment is in response to a comment by Sengers and Anisimov on the article “Gibbs density surface of fluid argon” that contradicts prevailing theory. It has not “been established experimentally that the thermodynamic properties of fluids satisfy scaling laws with universal critical exponents asymptotically close to a single critical point of the vapor–liquid phase transition.” Here we explain why an apparent divergence of C v , in historical experimental “evidence,” is based upon a misinterpretation of near-critical gas–liquid heat capacity measurements in the two-phase coexistence region. The conclusion that there is no “singular critical point” on Gibbs density surface still stands.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-017-2277-8