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High-pressure Sapphire Cell for Phase Equilibria Measurements of CO2/Organic/Water Systems
Published on: January 24, 2014
Experimental study of water thermodynamics up to 1.2 GPa and 473 K
L N Dzhavadov1, V V Brazhkin1, Yu D Fomin1
1Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences, 108840 Kaluzhskoe shosse, 14, Troitsk, Moscow, Russia.
Abstract:
Water is the most common liquid on the Earth. At the same time, it is the strangest liquid having numerous anomalous properties. For this reason, although water was investigated in numerous studies, many questions still remain unanswered. Even the thermodynamic properties of water at high pressures are unknown. In this paper, we present an experimental study of the thermodynamic properties of water up to a pressure of 12 kbar and a temperature of 473 K far above the range of pressures and temperatures in previous studies. We compare the experimental results to the results of computer simulations of two models of water (SPC/E and TIP4P) and show that the SPC/E model is not appropriate at high pressure, while the TIP4P model describes the equation of state of water, but fails to describe the heat capacity.
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