Data/hora: 11/06/2024 03:30:16

Provedor de dados: 	17	
País: 	United Kingdom	
Título: 	Dielectric Constant of Water Discovered to be Simple Function of Density over Extreme Ranges from &amp;#x2013; 35 to + 600^o^C and to 1200 MPa (12000 Atm.), Believed Universal	
Autores: 	William L.  Marshall.	
Data: 	2008-11-04	
Ano: 	2008	
Palavras-chave: 	Chemistry; Earth &amp; Environment.	
Resumo: 	The experimental static dielectric constants (_[epsilon]_) of water formulated by Fern&amp;#xe1;ndez, et al., (1997-International Association for the Properties of Water and Steam, IAPWS), &amp;#x2013;35 to 600^o^C; 0.1 to 1200 MPa, are discovered to be closely described throughout by a simple equation of density (_[rho]_), presented here, and agreeing with their reported calculated (extrapolated) values to 923^o^C.  Eight limiting boundary conditions are observed.  Values of _[epsilon]_ follow isothermal straight-line slopes of log (_[epsilon]_ &amp;#x2013; 1) vs log _[rho]_ down to densities of 0.25 g cm^-3^ water, even in dioxane-water solutions.   At lower densities, all slopes curve asymptotically in approaching unity, while becoming unity throughout at &amp;#x2013;35^o^C (near metastable freezing point).  Slopes above 0.25 g cm^-3^ asymptotically approach 1 2/3 at high temperatures that numerically proportionates (_[epsilon]_ &amp;#x2013; 1) to volume times surface densities, with a proposed explanation given.  Values for _[epsilon]_ of water dissolved in dioxane down to 0.006 g cm^-3^ water (25-300^o^C) and in benzene to 0.014 g cm^-3^ water (300-400^o^C) extend uninterrupted from those for pure water.  The Deul-Franck (1984, 1991) values of _[epsilon]_ for benzene (25-400^o^C; to 400 MPa) by the relationship fall on a single straight-line independent of temperature.  Theorists should evaluate this simple relationship of water and other liquids to density that appears to be universal.	
Tipo: 	Manuscript	
Identificador: 	http://precedings.nature.com/documents/2472/version/1

oai:nature.com:10.1038/npre.2008.2472.1

http://dx.doi.org/10.1038/npre.2008.2472.1	
Fonte: 	Nature Precedings	
Fonte: 	Creative Commons Attribution 3.0 License