Ideal gas constant: Difference between revisions

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<onlyinclude>The '''ideal gas constant''' is also known as the molar gas constant, the gas constant or the universal gas constant. This constant is written as <math>R</math>, and is a constant of proportionality (constant number that is multiplied on one side of a proportional relationship to make them equal) for the [[ideal gas law]].<ref>"Gas constant," Wikipedia, 2021. [Online]. Available: https://en.wikipedia.org/wiki/Gas_constant. [Accessed: 06-May-2021]</ref> </onlyinclude> The ideal gas law is simply <math>PV=nRT</math> where <math>P</math> is pressure, <math>V</math> is volume, <math>n</math> is the number of [[mole]]s of gas, and <math>R</math> is the ideal gas constant.<ref>"The Ideal Gas Law," Chemistry LibreTexts, 2020. [Online]. Available: https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Physical_Properties_of_Matter/States_of_Matter/Properties_of_Gases/Gas_Laws/The_Ideal_Gas_Law. [Accessed: 06-May-2021]</ref>  
<onlyinclude>The '''ideal gas constant''' is also known as the '''molar gas constant''', the '''gas constant''' or the '''universal gas constant'''. This constant is written as <math>R</math>, and is a constant of proportionality (constant number that is multiplied on one side of a proportional relationship to make them equal) for the [[ideal gas law]].<ref>"Gas constant," Wikipedia, 2021. [Online]. Available: https://en.wikipedia.org/wiki/Gas_constant. [Accessed: 06-May-2021]</ref> </onlyinclude> The ideal gas law is simply <math>PV=nRT</math> where <math>P</math> is pressure, <math>V</math> is volume, <math>n</math> is the number of [[mole]]s of gas, and <math>R</math> is the ideal gas constant.<ref>"The Ideal Gas Law," Chemistry LibreTexts, 2020. [Online]. Available: https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Physical_Properties_of_Matter/States_of_Matter/Properties_of_Gases/Gas_Laws/The_Ideal_Gas_Law. [Accessed: 06-May-2021]</ref>  


This constant of proportionality depends on which units are used for the other variables in the ideal gas law equation. Some common values for <math>R</math> are:
This constant of proportionality depends on which units are used for the other variables in the ideal gas law equation. Some common values for <math>R</math> are:
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==References==
==References==
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Revision as of 19:37, 15 October 2021

The ideal gas constant is also known as the molar gas constant, the gas constant or the universal gas constant. This constant is written as [math]R[/math], and is a constant of proportionality (constant number that is multiplied on one side of a proportional relationship to make them equal) for the ideal gas law.[1] The ideal gas law is simply [math]PV=nRT[/math] where [math]P[/math] is pressure, [math]V[/math] is volume, [math]n[/math] is the number of moles of gas, and [math]R[/math] is the ideal gas constant.[2]

This constant of proportionality depends on which units are used for the other variables in the ideal gas law equation. Some common values for [math]R[/math] are:


This constant is closely related to Boltzmann's constant, [math]k_B[/math] (to get the ideal gas constant from Boltzmann's constant, multiply by Avogadro's number: [math]R=N_A k_B [/math]).

Further Reading

References