I'm looking for a better relationship between the Kinetic energy of a gas and it's Temperature, and also how they vary with gravity (not altitude, just gravity!). So is there a model better than the Kinetic theory of gases that I can apply?

Thanks in advance!


closed as unclear what you're asking by Mithoron, DrMoishe Pippik, Tyberius, Todd Minehardt, pentavalentcarbon Jun 23 '18 at 0:41

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 4
    $\begingroup$ I'm not sure that you are wanting when you say 'better relationship'; better than what? The Maxwell and Boltzmann distributions of velocities have been well verified by experiment. The effect of gravity between molecules is utterly minute and the effect of the earth's gravity is present as a constant force. You could re-derive the Maxwell/Boltzmann equations using, say, the van-der -Waals equation instead of using the ideal gas but I would expect the distributions to have the same shape but shifted in value this way or that depending on how the calculation pans out. $\endgroup$ – porphyrin Jun 20 '18 at 11:48

The theory is for ideal gases, And accounts for macroscopic properties. The first assumptions that you have to eliminate to get a better result are

  1. Spherical assumption.
  2. Ideality assumption.

I suggest first you read through the concepts of Equations of state. Have a look at:

1.Van der Waals 2.Virial Equation of state 3.Tao Mason equation of state

Without you providing more information I can not see what do are you exactly looking for.


Not the answer you're looking for? Browse other questions tagged or ask your own question.