Standard atmosphere: Difference between revisions
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<onlyinclude>A '''standard atmosphere''', abbreviated ''atm'', is the [[unit]] of [[pressure]] equal to the average atmospheric pressure at [[sea level]].</onlyinclude> Specifically 1 atm = 101,325 [[pascal]]s,<ref>R. Serway and J. Jewett, "Pressure," in ''Physics for Scientists and Engineers'', 8th ed., Belmont, CA: Cengage Learning, 2010, ch.14, sec.1, pp. 405</ref> which is the [[SI]] unit of pressure. When scientists refer to [[STP]] (standard temperature and pressure), this refers to a set of conditions for a system, one of which is a pressure of 1 atm. | <onlyinclude>A '''standard atmosphere''', abbreviated ''atm'', is the [[unit]] of [[pressure]] equal to the average atmospheric pressure at [[sea level]].</onlyinclude> Specifically 1 atm = 101,325 [[pascal]]s,<ref>R. Serway and J. Jewett, "Pressure," in ''Physics for Scientists and Engineers'', 8th ed., Belmont, CA: Cengage Learning, 2010, ch.14, sec.1, pp. 405</ref> which is the [[SI]] unit of pressure. When scientists refer to [[STP]] (standard temperature and pressure), this refers to a set of conditions for a system, one of which is a pressure of 1 atm. | ||
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==Conversions== | ==Conversions== | ||
<html><br /> <iframe src=" | <html><br /> <iframe src="https://energyeducation.ca/simulations/converter/converter.php?defaultMeasure=Pressure&defaultFrom=standard atmosphere&defaultTo=kilopascal" scrolling="no" width="750" height="200"> </iframe><br /> </html> | ||
To read more about the atm, click [http://www.unc.edu/~rowlett/units/dictA.html#atmosphere here]. | To read more about the atm, click [http://www.unc.edu/~rowlett/units/dictA.html#atmosphere here]. | ||
Latest revision as of 14:30, 25 June 2018
A standard atmosphere, abbreviated atm, is the unit of pressure equal to the average atmospheric pressure at sea level. Specifically 1 atm = 101,325 pascals,[1] which is the SI unit of pressure. When scientists refer to STP (standard temperature and pressure), this refers to a set of conditions for a system, one of which is a pressure of 1 atm.
This is an important unit for describing gasses, as pressure is one of the state variables that describe the gas in a heat engine.
Conversions
To read more about the atm, click here.
For further reading
References
- ↑ R. Serway and J. Jewett, "Pressure," in Physics for Scientists and Engineers, 8th ed., Belmont, CA: Cengage Learning, 2010, ch.14, sec.1, pp. 405