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# Topic: Standard temperature and pressure

###### In the News (Wed 19 Jun 19)

 SparkNotes: Ideal Gases: Terms and Formulae The sum of the partial pressures of gases in a mixture is equal to the total pressure of the mixture. Standard atmospheric temperature and pressure - Conditions where T = 298K and P = 1bar. Standard temperature and pressure (STP) - Conditions where T = 273K and P = 1atm. www.sparknotes.com /chemistry/gases/ideal/terms.html   (525 words)

 The MSDS HyperGlossary: Standard Temperature and Pressure (STP) The MSDS HyperGlossary: Standard Temperature and Pressure (STP) Standard Temperature and Pressure (STP) is defined as 0 degrees Celsius and 1 atmosphere of pressure. The letters "STP" occur most commonly on an MSDS after a physical property such as the density or flammable limit of a gas or the vapor pressure of a material. www.ilpi.com /msds/ref/stp.html   (535 words)

 STANDARD TEMPERATURE AND PRESSURE Usually a temperature of 0 degrees C but also used to designate a temperature of 15 degrees C and 1 standard atmosphere (see standard pressure). In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0°C (273.15 K) and pressure of 1 atm (defined as 101325 Pa). In aviation, standard temperature and pressure at sea level are 15°C and 29.92 in. www.websters-online-dictionary.org /definition/english/st/standard+temperature+and+pressure.html   (217 words)

 Ideal Gas Law The temperature is taken to be proportional to this average kinetic energy; this invokes the idea of kinetic temperature. A convenient standard quantity is the mole, the mass of gas in grams equal to the molecular mass in amu. For example in the heat-work example, the final state is characterized by a specific temperature (a state variable) regardless of whether it was brought to that state by heating, or by having work done on it, or both. hyperphysics.phy-astr.gsu.edu /hbase/kinetic/idegas.html   (1049 words)

 Standard conditions for temperature and pressure - Wikipedia, the free encyclopedia Temperature and air pressure can vary from one place to another on the Earth, and can also vary in the same place with time. In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0 °C (273.15 K) and pressure of 1 atm (defined as 101.325 kPa). When used to calculate performance at any pressure altitude other than sea level, the temperature is adjusted using the prescribed lapse rate which is −6.5 °C/km for the first 11 km. en.wikipedia.org /wiki/Standard_temperature_and_pressure   (315 words)

 Knowledge King - Standard temperature and pressure   (Site not responding. Last check: ) In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0°C (273.15 K) and pressure of 1 atm (defined as 101325 Pa). In aviation, standard temperature and pressure at sea level are 15°C and 29.92 in. When used to calculate performance at any pressure altitude other than sea level, the temperature is adjusted using the dry adiabatic lapse rate. www.knowledgeking.net /encyclopedia/s/st/standard_temperature_and_pressure.html   (107 words)

 Standard conditions for temperature and pressure   (Site not responding. Last check: ) In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0°C (273.15 K) and pressure of 1 atm (defined as 101.325 kPa). Also in chemistry, the term Standard Ambient Temperature and Pressure (abbreviated SATP) denotes a reference temperature of 25°C (298.15 K) and pressure of 100 kPa. When used to calculate performance at any pressure altitude other than sea level, the temperature is adjusted using the prescribed lapse rate which is -6.5 °C/km for the first 11 km. www.arikah.net /encyclopedia/Standard_temperature_and_pressure   (323 words)

 Standard-state enthalpies For liquids and solids, the standard state is the thermodynamically stable state at a pressure of 1 atm and a specified temperature. For gases, the standard state is the gaseous state at a pressure of 1 atm and a specified temperature, based on the assumption of ideal gas behavior. For dissolved species, the standard state is a 1 M solution at a pressure of 1 atm and specified temperature, based on the assumption of ideal solution behavior. www.nyu.edu /classes/tuckerman/honors.chem/lectures/lecture_15/node9.html   (674 words)

 Phase Changes: Vapor Pressure   (Site not responding. Last check: ) The vapor pressure is literally the partial pressure of the compound in the gas. Thus at low temperatures the vapor pressure of the liquid is very low and at high temperatures the vapor pressure is quite large. Thus the pressure measured by the manometer is attributable solely to the enthanol vapor. www.chm.davidson.edu /ChemistryApplets/PhaseChanges/VaporPressure.html   (603 words)

 standard temperature and pressure (STP, s   (Site not responding. Last check: ) standard temperature and pressure (STP, s.t.p., standard conditions) – a standard condition for the reduction of gas temperatures and pressures. Standard temperature is now 298.15 K; it was formerly 273.15 K, i.e. The standard pressure for gases was formerly 101325 Pa (760 mmHg or 1atm). www.yphysics.freenet.kz /Words%20S/standard%20temperature%20and%20pressure.htm   (79 words)

 USATODAY.com   (Site not responding. Last check: ) The standard atmosphere can be thought of as the average pressure, temperature and air density for various altitudes. It also shows in a general way the pressures and temperatures to be expected at various altitudes. The standard atmosphere is based on mathematical formulas that reduce temperature and pressure by certain amounts as altitude is gained. www.usatoday.com /weather/wstdatmo.htm   (206 words)

 Welcome :: Telemet :: Meteorology Weather Glosary, from A to Z There are two general types of altimeters: (a) the pressure altimeter, which gives an approximate measure of altitude from a pressure measurement and an assumed standard temperature distribution; and (b) the radio altimeter, which deduces altitude by electronic techniques. The value of atmospheric pressure to which the scale of a pressure altimeter is set so as to indicate airport elevation. The electrical power required to equalize the temperature of the four strips is taken as a measure of the solar radiation. www.telemet.com /glossary   (1535 words)

 Welcome to Adobe GoLive 4 The dispersion of pollutants arising near the ground is greatly hindered by the presence of a temperature inversion. Ra- diation inversion, a temperature inversion produced by cooling by radiation: from the earth's surface at night, from a surface of snow or ice; from the upper part of a layer of cloud, etc. Subsidence temperature inversion, an upper-level temperature inversion caused by subsidence (q.v.) (WMO). At a given temperature and pressure, the state of moist air whose mixing ratio is such that the moist air can coexist in neutral equilibrium with an associated condensed phase (liquid or solid) at the same temperature and pressure, the surface of separation being plane (WMO). www.cse.polyu.edu.hk /~airlab/glossary/glo_a_cont.html   (8619 words)

 STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure Since temperature and air pressure may vary form site to site it is necessary with standard reference conditions for testing and documentation of chemical and physical processes. STP is commonly used to define standard conditions for temperature and pressure, which is important for the measurements and documentation of chemical and physical processes. SATP - Standard Ambient Temperature and Pressure is also used in chemistry as a reference with temperature of 25°C (298.15 K) and pressure of 101 kPa. www.hvac-toolbox.com /37_772.html   (369 words)

 Standard temperature and pressure : STP   (Site not responding. Last check: ) terms defined : Standard temperature and pressure : STP In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0°C (273. Even the excellent commonwealth attorney laid aside on that day some Pulsanda tellus." And he really did drink his glass of wine, and opened the ball with But M. Mechinet was there, quite brilliant, and, thanks to Jacques, the large sums of money which they extorted from. www.termsdefined.net /st/stp.html   (294 words)

 What is standard temperature and pressure? - a definition from Whatis.com - see also: pressure, standard, temperature, ... This is essentially the freezing point of pure water at sea level, in air at standard pressure. Standard pressure supports 760 millimeters in a mercurial barometer (760 mmHg). The density of air at STP is approximately 1.29 kilogram per meter cubed (1.29 kg/m whatis.techtarget.com /reprints/0,296569,sid9_gci539342,00.html   (299 words)

 Standard temperature and pressure: Definition and Links by Encyclopedian.com - All about Standard temperature and ... Standard temperature and pressure: Definition and Links by Encyclopedian.com - All about Standard temperature and pressure These values approximate freezing temperature and atmospheric pressure at sea level. Definition / meaning of Standard temperature and pressure: www.encyclopedian.com /st/STP.html   (80 words)

 STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure Since temperature and air pressure may vary form place to place it is necessary with standard reference conditions for testing and documentation of chemical and physical processes. STP is commonly used to define standard conditions for temperature and pressure which is important for the measurements and documentation of chemical and physical processes: SATP - Standard Ambient Temperature and Pressure is a reference with temperature of 25 degC (298.15 K) and pressure of 101 kPa. www.engineeringtoolbox.com /stp-standard-ntp-normal-air-d_772.html   (602 words)

 standard temperature and pressure — Infoplease.com   (Site not responding. Last check: ) STP - STP STP or standard temperature and pressure,standard conditions for measurement of the properties... Standard and routine metabolic rates of juvenile sandbar sharks (Carcharhinus plumbeus), including the effects of body mass and acute...... Heartwood temperatures of red pine pole stock during pentachlorophenol pressure treatment and presence of decay fungi prior to treatment....... www.infoplease.com /ce6/sci/A0919132.html   (194 words)

 White Papers, Product Information and Research Reports on standard, temperature, and, pressure SUMMARY: The pressure to increase energy efficiency and "green up" IT is forcing IT professionals to select hardware and software that consume less power. Business pressures that keep employees out of headquarters and close to customers and partners have met head-on with other drivers that are bringing far flung servers back to the datacenter. SUMMARY: Download this white paper and learn the purpose of the PCI-Data Security Standard, how to define the 12 major requirements of the standard, and how your company can effectively demonstrate compliance with these requirements to satisfy an au... www.bitpipe.com /data/search?cp=bpres&cr=bpres&qg=VENDOR&qt=standard+temperature+and+pressure&src=wis   (562 words)

 Pressure sensitive adhesive backed felts, cork & rubber Pressure sensitive adhesive backed felts, cork and rubber A standard line of pressure sensitive felt dots and discs Standard Pressure Sensitive Felt Dots and Discs - www.aetnafelt.com /pressure_sensitive_felts.htm   (104 words)

 What is standard temperature and pressure? - a definition from Whatis.com - see also: pressure, standard, temperature, ... - Standard temperature and pressure, abbreviated STP, refers to nominal conditions in the atmosphere at sea level. This is essentially the freezing point of pure water at sea level, in air at standard pressure. Standard pressure supports 760 millimeters in a mercurial barometer (760 mmHg). searchsmb.techtarget.com /sDefinition/0,,sid44_gci539342,00.html   (299 words)

 Bambooweb: Standard temperature and pressure In chemistry, the term standard temperature and pressure (abbreviated STP) denotes an exact reference temperature of 0°C (273.15 K) and pressure of 1 atm (defined as 101.325 kPa). These values approximate freezing temperature of water and atmospheric pressure at sea level. When used to calculate performance at any pressure altitude other than sea level, the temperature is adjusted using the prescribed dry adiabatic lapse rates (which are -6.5°C/km for the first 11 km). www.bambooweb.com /articles/s/t/Standard_temperature_and_pressure.html   (195 words)

 Re: when was the first time that Standard Temperature and Pressure was used? What this means is that there is not a lot of use in specifying a gas volume as a measure of the amount of gas unless you also specify the temperature and pressure that the volume of gas is measured at. A small correction has to be applied to mercury column pressure measurements to allow for expansion of the mercury with temperature. Even so, it is a bit unfortunate that the standard temperature for STP is an uncomfortably cool one, and, more importantly, that it does not conform to the 25 deg C standard used for so many other chemical quantities. www.madsci.org /posts/archives/jun99/927781538.Ch.r.html   (600 words)

 Catalogo Articoli   (Site not responding. Last check: ) Simultaneous vertical profiles of the scattering coefficient of the air at one wavelength between 0.475 and 0.75 mu m, temperature, pressure, and relative humidity have been measured from 1973 to 1978, mostly in Central and Western Europe. From these results, vertical profiles of the normalized (to air at standard temperature and pressure) scattering coefficients of dry particles were derived. These standardized scattering coefficients are independent of the thermodynamic state of theatmosphere and thus strictly comparable. serials.cib.unibo.it /cgi-ser/start/it/spogli/df-s.tcl?prog_art=838607&language=ITALIANO&view=articoli   (284 words)

 Standard Pressure Volume Temperature Data for Polymers   (Site not responding. Last check: ) From the IntroductionPVT data consists of records of the specific volume of a material (or its inverse, the density) as a function of pressure and temperature. There are many reasons why the specific volume of a material will undergo changes: changes in the temperature and pressure (thermal expansion and compression), phase changes (solid-solid phase transitions, melting, crystallization, glass transitions, mesophase transitions), degradation reactions, and many more. Polymers are sensitive to pressure: the volume itself, the pressure dependence of transition temperatures, and the kinetics of phase transitions are all significant, not only from a scientific point of view, but also for practical applications in polymer engineering, such as processing. www.literacyconnections.com /0_1566763282.html   (276 words)

 D2879-97(2002)e1 Standard Test Method for Vapor Pressure-Temperature Relationship and Initial Decomposition Temperature ... It is applicable to liquids that are compatible with borosilicate glass and that have a vapor pressure between 133 Pa (1.0 torr) and 101.3 kPa (760 torr) at the selected test temperatures. For measurement of the apparent vapor pressure in open systems, Test Method D 2878, is recommended. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. www.astm.org /DATABASE.CART/PAGES/D2879.htm   (336 words)

 Power Measurement. Pneumatic Calibrator. Pressure Standard. Calibrator. Pump. pH meter. Phonometer. Power Amplifiers. ... Temperature relative humidity and external sensor Data logger. Temperature Relative Humidity panel regulator for connection to temperature and relative humidity transmitters. Pressure ranges from 0.2 to 700 bar, 4 to 10 000 psi. www.hotektech.com /newproductsp.htm   (2643 words)

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