Ideal Gas Constant - Energy Education

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Ideal gas constant

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 R, 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 PV=nRT where P is pressure, V is volume, n is the number of moles of gas, and R 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 R are:

  • 8.3145 J /(mol K)
  • 8.3145 (m3 Pa) / (mol K)
  • 0.082057 L atm/ (mol K)

This constant is closely related to Boltzmann's constant, kB (to get the ideal gas constant from Boltzmann's constant, multiply by Avogadro's number: R=NAkB).

Further Reading

  • Molecule and Avogadro's number
  • Boltzmann's constant
  • Ideal gas law
  • Pressure volume diagram
  • Or explore a random page

References

  1. ↑ "Gas constant," Wikipedia, 2021. [Online]. Available: https://en.wikipedia.org/wiki/Gas_constant. [Accessed: 06-May-2021]
  2. ↑ "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]
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