The STP and the SATP should not be confused with the standard state commonly used in thermodynamic evaluations of the Gibbs energy of a reaction. Prefix or symbol for pound per cubic foot is: lb/ft3 Technical units conversion tool for density measures. The following table lists the density D of water as a function of the temperature under isobaric conditions 1, 2: Pure, air-free water H 2 O, Normal pressure: 1013. The density of water (H 2 O) changes depending on temperature and pressure - as with other substances. An unofficial, but commonly used standard is standard ambient temperature and pressure (SATP) as a temperature of 298.15 K (25 C, 77 F) and an absolute pressure of 100 kPa (14.504 psi, 0.987 atm). Water Density Table Data chart with the density of water at different temperatures. In chemistry, IUPAC established standard temperature and pressure (informally abbreviated as STP) as a temperature of 273.15 K (0 C, 32 F) and an absolute pressure of 100 kPa (14.504 psi, 0.987 atm, 1 bar). The International Standard Metric Conditions for natural gas and similar fluids are 288.15 K (59.00 F 15.00 C) and 101.325 kPa. NIST uses a temperature of 20 C (293.15 K, 68 F) and an absolute pressure of 101.325 kPa (14.696 psi, 1 atm). Compute the Depth of Water associated with a Pressure.The Density of Water at Standard Temperature and Pressure (STP) is 998.2071 kg/m 3 in SI units. This is used as a reference substance for defining Specific Gravity. Metric and Imperial please use the engineering unit calculators. The Density of Water at Standard Temperature and Pressure is 62.316 lbs/ft 3. Density Table / Temperature Density and Specific Weight of Water in English Units.
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