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0.019 336 77 psi. The torr (symbol: Torr) is a unit of pressure based on an absolute scale, defined as exactly 1 760 of a standard atmosphere (101325 Pa). Thus one torr is exactly 101325 760 pascals (≈ 133.32 Pa). Historically, one torr was intended to be the same as one "millimeter of mercury", but subsequent redefinitions of ...
Download as PDF; Printable version; ... 1 atm ≡ 101 325: ≡ 1.013 25: 1.0332 — ... Template documentation. Usage. See also. Category:Pressure ...
Since 1982, STP has been defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 10 5 Pa (100 kPa, 1 bar). NIST uses a temperature of 20 °C (293.15 K, 68 °F) and an absolute pressure of 1 atm (14.696 psi, 101.325 kPa). [ 3 ] This standard is also called normal temperature and pressure (abbreviated as NTP).
The standard atmosphere was originally defined as the pressure exerted by a 760 mm column of mercury at 0 °C (32 °F) and standard gravity (g n = 9.806 65 m/s 2). [2] It was used as a reference condition for physical and chemical properties, and the definition of the centigrade temperature scale set 100 °C as the boiling point of water at this pressure.
The International Standard Atmosphere (ISA) is a static atmospheric model of how the pressure, temperature, density, and viscosity of the Earth's atmosphere change over a wide range of altitudes or elevations. It has been established to provide a common reference for temperature and pressure and consists of tables of values at various altitudes ...
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and for the reverse conversion: where: ppmv. = air pollutant concentration, in parts per million by volume. mg/m 3. = milligrams of pollutant per cubic meter of air. T {\displaystyle T} = atmospheric temperature in kelvins = 273.15 + °C. 0.08205.
Van der Waals constants (data page) The following table lists the Van der Waals constants (from the Van der Waals equation) for a number of common gases and volatile liquids. [1] To convert from to , multiply by 100. To convert from to , divide by 10. To convert from to , divide by 1000. a (L 2 bar/mol 2)