Singularity-free interpretation of the thermodynamics of supercooled water. II. Thermal and volumetric behavior

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.476600· OSTI ID:636144

Rebelo, L P; Debenedetti, P G; Sastry, S ^[1]

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1. Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544-5263 (United States)

According to the singularity-free interpretation of the thermodynamics of supercooled water, the isothermal compressibility, isobaric heat capacity, and the magnitude of the thermal expansion coefficient increase sharply upon supercooling, but remain finite. No phase transition or critical point occurs at low temperatures. Instead, there is a pronounced but continuous increase in volume and a corresponding decrease in entropy at low temperatures, the sharpness of which becomes more pronounced the lower the temperature and the higher the pressure. We investigate the behavior of the response functions, equation of state, and entropy of a schematic waterlike model that exhibits singularity-free behavior, and thereby illustrate the simplest thermodynamically consistent interpretation that is in accord with existing experimental evidence on water{close_quote}s low-temperature anomalies. In spite of its simplicity, the model captures many nontrivial aspects of water{close_quote}s thermodynamics semiquantitatively. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 636144
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 2 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
COMPRESSIBILITY
COOLING
LIQUIDS
SPECIFIC HEAT
THERMAL EXPANSION
THERMODYNAMIC PROPERTIES
WATER