Reply to Comment on ‘Behavior of Supercritical Fluids across the Frenkel Line’

Year: 2018

Authors: Bryk T., Gorelli F. A., Mryglod I., Ruocco G., Santoro M., Scopiglio T.

Autors Affiliation: [Bryk, T.; Mryglod, I.] Natl Acad Sci Ukraine, Inst Condensed Matter Phys, 1 Svientsitskii St, UA-79011 Lvov, Ukraine.
[Bryk, T.] Lviv Polytech Natl Univ, Inst Appl Math & Fundamental Sci, UA-79013 Lvov, Ukraine.
[Gorelli, F. A.; Santoro, M.] CNR, INO, I-50019 Sesto Fiorentino, Italy and European Lab Non Linear Spect, I-50019 Sesto Fiorentino, Italy.
[Ruocco, G.; Scopigno, T.] Ist Italiano Tecnol, Ctr Life Nano Sci Sapienza, 295 Viale Regina Elena, I-00161 Rome, Italy.
[Ruocco, G.; Scopigno, T.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.

Abstract: In a previous letter and other papers, we have interpreted the supercritical region of fluids as being parted into a gas-like and a liquid-like regimes. The boundary between these two distinct regions of the P-T phase diagram of substances is represented by the Widom line, extending the subcritical liquid-gas 1st order transition line above the critical point. Out authors have been commenting on our interpretation, claiming that the two regions are parted by the so called Frenkel line, which does not reconnect to the subcritical liquid-gas phase boundary. In this work, we show on a solid theoretical basis that the Frenkel line is incorrect and that indeed the Widom line is the relevant boundary between to two supercritical regimes.

Journal/Review: JOURNAL OF PHYSICAL CHEMISTRY B

Volume: 122 (22)      Pages from: 6120  to: 6123

KeyWords: supercritical fluids, dynamics
DOI: 10.1021/acs.jpcb.8b01900

ImpactFactor: 2.923
Citations: 16
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