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The Ideal Gas with Radiation

  • Rudolf Kippenhahn
  • Alfred Weigert
Chapter
Part of the Astronomy and Astrophysics Library book series (AAL)

Abstract

For an ideal gas consisting of n particles per unit volume that all have molecular weight μ, the equation of state is
$$ P = nkT = \frac{\Re }{\mu }\rho T, $$
(13.1)
with ϱ = nμmn (k = 1.38 × 10-16 erg K-1 = Boltzmann constant; ℜ = k/m u = 8.31 × 107 erg K-1g-1 = universal gas constant; mu = 1 amu = 1.66053 × 10-24 g = the atomic mass unit). Note that we here use the gas constant with a dimension (energy per K and per unit mass) different from that in thermodynamic text books (energy per K and per mole). This has the consequence that here the molecular weight m is dimensionless (instead of having the dimension mass per mole); it is simply the particle mass divided by 1 amu.

Keywords

Free Electron Radiation Pressure Dimension Mass Deep Interior Helium Nucleus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • Rudolf Kippenhahn
    • 1
  • Alfred Weigert
  1. 1.GöttingenGermany

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