Question 1:(adsbygoogle = window.adsbygoogle || []).push({});

The mean speed for escaping molecules from a hole is 1.88*(k*T)/m)^1/2 (Eq.1)

The mean speed for molecules in the Maxwell-Boltz Distribution is 1.596*((k*T)/m)^1/2 (Eq.2

If you were to calculate molecular flux for an ideal gas, which expression would you use?

In my textbook, it uses Eq.2 This does not make sense to me. I would use Eq.1

Question 2:

How does I*dv = 1/4*v*n*dv (Eq.3), using I=1/4*n*vmean (Eq.4)?

Eq.3 represents molecular flux, I (that strike a surface, per unit area and per unit time) with molecular speeds in the range v+dv

Eq.4 represents molecular flux, I

I understand the derivation for Eq.4

I do not understand how can you use Eq.4, which has vmean, to get to Eq.3, which has v?

Any help would be appreciated!

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Statistical Mechanics, Molecular Flux, Kinetic Theory

Can you offer guidance or do you also need help?

Draft saved
Draft deleted

Loading...

Similar Threads for Statistical Mechanics Molecular |
---|

I Statistics and Heisenberg |

I In quantum statistics, inhibition/enhancement factors |

A Fermi and Bose gas in statistical mechanics |

**Physics Forums | Science Articles, Homework Help, Discussion**