View source for Standard conditions for temperature and pressure

[[Category:Done 2021-01-31]]
[[File:ACS STP.jpg|thumbnail|right|300px|At STP conditions a gas will occupy 22.4 L. <ref>Gas Laws Stoichiometry - Lessons - Tes Teach", Tes Teach with Blendspace, 2019. [Online]. Available: https://www.tes.com/lessons/qkO75TOfzHUVSw/gas-laws-stoichiometry. [Accessed: 19- Nov- 2019]. This ball is apparently available for purchase!</ref>]]

<onlyinclude>'''Standard conditions for temperature and pressure''', or '''STP''', also referred to as '''standard conditions for gases''', is a specific [[pressure]] and [[temperature]] that scientists use to report the properties of [[gas]]es. (These are similar to '''NTP''' and '''SATP''', see more below.)</onlyinclude> This standard makes it easier to compare different measurements for gases, such as the [[mole]]s of gas in a given [[volume]].<ref name=Rice>''Chemistry,'' Rice University, 2015. [Online]. Available: https://web.ung.edu/media/Chemistry2/Chemistry-LR.pdf</ref> It is necessary to have a standard [[temperature]] and [[pressure]] for scientists to use in all locations around the globe in order to make meaningful comparisons between sets of data. The conditions at STP are:
*'''Temperature:''' 273.15 [[Kelvin|K]] ([[celsius|0°C]] or [[fahrenheit|32°F]])

*'''Pressure:''' 10<sup>5</sup> [[Pascal]]s (formerly 1 [[atm]], but IUPAC has since changed this standard).<ref>IUPAC, ''STP'' [Online], Available: http://goldbook.iupac.org/S06036.html</ref> 

Since the [[volume]] of a [[gas]] depends on the temperature and pressure, one [[mole]] of an [[ideal gas law|ideal gas]] at STP conditions has a volume of 22.4 [[liter]]s. This volume can be found using the [[ideal gas law]], <math>PV=nRT</math>. 


In addition to '''STP''', there are other [[temperature]]s and [[pressure]]s that can be used to compare properties of [[gas]]es. Other frequently used conditions are '''NTP''' ('''Normal Temperature and Pressure''') and '''SATP''' ('''Standard Ambient Temperature and Pressure'''). NTP is defined as a gas at 293.15 Kelvin (20°C) and 10<sup>5</sup> Pascals. And SATP is defined as a gas at 298.15 K (25°C) and 10<sup>5</sup> Pascals.

==For Further Reading==
*[[Temperature]]
*[[Pressure]]
*[[Gas]]
*[[Volume]]
*[[Mole]]
*Or explore a [[Special:Random|random page]]

==References==
{{reflist}}
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