Density of water at temperature table4/10/2024 ![]() Almost all of them are entirely empirical. For this reason, several equations have been proposed for different ranges of temperature and pressure. High temperature and pressure conditions are important for engineering processes and geothermal studies. The accuracy of most of the high temperature data is better than 1%, while in the lower temperature limit (below 70✬) the accuracy of most of the data is around 0.1%.Īs a consequence of this lack of data, attempts to estimate the properties of aqueous species at high temperature and/or high pressure rely on estimated or extrapolated values of the dielectric constant of water. There are few measurements available for pressures between 200MPa and 500MPa. Most of the experimental data available is for a relatively large range of temperatures (up to 670K) at relatively low pressures (under 200MPa). Because of its simplicity and accuracy, the proposed equation is useful for simulation studies and for any other problem where the knowledge of those properties as a function of pressure is needed.Ī relatively small number of studies on the measurement of the dielectric constant of water as a function of temperature (T) and pressure (P) have been reported in the literature. The equation reproduces available data for dielectric constant and density of water to an accuracy of 0.1%. ![]() A simple equation of the form X = X (T, P i) + a0 ln (a i+ P)/(a i + P i) is proposed to describe both properties as function of pressure, at constant temperatures. In order to simulate the effects of hydrostatic pressure on protein folding/unfolding it is necessary to accurately describe the behavior of the dielectric constant and the density of the solvent (water), in the range of pressures (between 0.1 MPa and 2.0 GPa) and temperatures (below 75 ° C) required for pressure-induced unfolding. IIDepartamento de Físico-Química, Instituto de Química, Universidade Federal do Rio de Janeiro, 21949-900, Rio de Janeiro, RJ, Brazil ICentro de Ciências Exatas, Departamento de Física, Universidade Federal do Espírito Santo, Vitória, ES, 29060-900, Brazil Wely Brasil Floriano I Marco Antonio Chaer Nascimento II Dielectric constant and density of water as a function of pressure at constant temperature
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