Problem 2.238

An ideal gas consists of rigid diatomic molecules. How will a diffusion coefficient $D$ and viscosity coefficient $\eta$ change and how many times if the gas volume is decreased adiabatically $n=10$ times?

D \text { decreases } n^{4 / 5} \approx 6.3 \text { times, } \eta \text { increases } n^{1 / 5} \approx 1.6 \text { times. }

Transport Phenomena