Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

5.3 Transport processes in gases 113
5.3.3 Heat conduction
I
Figure 5.10: Heat conduction is described by Fourier’s law.
• Fourier’s law (for constant temperature gradient):
−→ =
µ
= −
(5.117)
• Ansatz:
y
• Result:
Γ = = internal energy per molecule (5.118)
−→
= − 1 µ
2
= − 1 µ µ
2
= − 1 µ µ
2
= − 1 µ
2
(5.119)
(5.120)
(5.121)
(5.122)
= 1 2 (5.123)
with = number density and = specific heat per molecule.