Phase Diagram of Electrostricted H2O at Surfaces of Electrodes at 273–373 K: Electric Critical Point of Water

✍ Scribed by Irena Danielewicz-Ferchmin; A. Ryszard Ferchmin

• Book ID: 102118144
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 178 KB
• Volume: 6
• Category: Article
• ISSN: 1439-4235
• DOI: 10.1002/cphc.200500106

✦ Synopsis

Abstract

The equation of state of an open system containing water in an electric field of strength E greater than 10^8^ V m^−1^ leads to a phase diagram with two‐phase and single‐phase regions in the Π,E,T coordinates (Π=electrostriction pressure). The phases differ by their degree of orientation of H~2~O molecules in the field. The phase transition is discontinuous with respect to E__. The calculation shows that the discontinuity vanishes at the critical point:__ Π~c~≈0.2 GPa, E~c~≈10^9^ V m^−1^ and ${{\rm T}{{{\rm E}\hfill \atop c\hfill}}}$ below 313 K. The thermal effect of the transition is calculated and compared with an experiment at the Hg/aqueous electrolyte interface found in the literature.