Densitas

Published: 2021-09-15 01:50:09
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2.2  Mechanical properties of materials2.2.1 DensitiesDensity of water (unit 1 kg m−3)Pure air-free water under a pressure of 101 325 Pa.Temp/ºC024681012141618  0999.84999.94999.97999.94999.85999.70999.50999.24998.94998.6020998.20997.77997.30996.78996.23995.64995.02994.37993.68992.9640992.21991.43990.62989.79988.92988.03987.11986.17985.20984.2160983.19982.15981.09980.00978.89977.76976.61975.43974.24973.0280971.79970.53969.25967.96966.64965.30963.95962.58961.18959.77100 958.34         Values based on the following expression (Kell, 1975, 97–105, recalculated for ITS-90 by Bettin and Spieweck, 1990, 195–196):  density at t/°C = (999.839 52 + 16.952 577t − 7.990 512 7 × 10−3t2 − 46.241 757 × 10−6t3                    + 105.846 01 × 10−9t4 − 281.030 06 × 10−12t5)/(1 + 16.887 236 × 10−3t)A new formula with lower uncertainty is available for the temperature range 0 °C to 40 °C, see Tanaka et al., 2001, 301-309. This new formula is valid for SMOW (standard mean ocean water) and it predicts density values that are about 3 ppm higher than those given by the above formula. Taking this into account, the deviations from the above formula are less than 1 ppm.In the range 0 to 25 °C, the correction (/kg m −3) for air-saturated water at temperature t (Bignell 1983, 57−59) is     −(4.612 − 0.106t) × 10−3The temperature (tm/°C) of maximum density at different pressures (p/Pa) is given by     tm = 3.98 − 0.222 × 10−6(p − 101 325)Information on the preparation of water as a reference material, together with the dependence of its density upon isotopic abundance can be found in Marsh (1987, 13–16). Density of heavy waterOriginally calculated by Kell (1967), from measurements by Chang and Tung (1949), Shrader and Wirtz (1951) and Steckel and Szapiro (1963).Under a pressure of 101 325 Pa.t/ºCρ/kg m-351105.62101105.99151105.87201105.34251104.45301103.23351101.73401099.96451097.94501095.69t/ºCρ/kg m-3 551093.24601090.59651087.76701084.74751081.57801078.23851074.73901071.10951067.341001063.44Density of mercury (unit 1 kg m-3)Under a pressure of 101 325 Pa.Temp/ºC024681012141618−20  13 644.6113 639.6413 634.6813 629.7213 624.7613 619.8113 614.8613 609.9113 604.9613 600.02  013 595.0813 590.1513 585.2113 580.2813 575.3613 570.4313 565.5113 560.5913 555.6813 550.762013 545.8513 540.9513 536.0413 531.1413 526.2413 521.3413 516.4513 511.5613 506.6713 501.784013 496.9013 492.0213 487.1413 482.2613 477.3913 472.5213 467.6513 462.7813 457.9213 453.056013 448.1913 443.3413 438.4813 433.6313.428.7713 423.9313 419.0813 414.2313 409.3913 404.558013 399.7113 394.8713 390.0413 385.2013 380.3713 375.5413 370.7213 365.8913 361.0713 356.24




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