A high pressure calorimetric experiment to validate the liquid-liquid critical point hypothesis in water

2007/01/23 by Manuel I. Marqués, Marques, Manuel I.
Engineering · Materials Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Material Dynamics and Properties #Phase Equilibria and Thermodynamics #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech)

paper · pdf · doi:10.48550/arxiv.cond-mat/0701556

openalex publication_date 2007/01/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

An experimental proposal to test the existence of a liquid-liquid critical point in water, based on high pressure calorimetric measurements, is presented on this paper. Considering the existence of an intramolecular correlation in the water molecule we show how the response of the specific heat at high pressure is different depending on the existence, or not, of the second critical point. If the liquid-liquid critical point hypothesis is true there must be a maximum in the specific heat at some temperature T>T_H for any pressure P>P_c (being T_H the homogeneous nucleation temperature and P_c the pressure of the second critical point). This maximum does not appear for the singularity free scenario.

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