Answer to Question #184740 in Molecular Physics | Thermodynamics for Khamosh Ray

Question #184740

c)

For a given gas the coefficient of viscosity is 1.9 x 10 Nsm and the diffusion

coefficient is 1.2 x 10-5 m?s-. Calculate the density and mean free path at average

molecular velocity of 380 ms-1


1
Expert's answer
2021-04-28T07:21:25-0400

ρ=ηD=1.91051.2105=1.58 kgm3,\rho=\frac{\eta}{D}=\frac{1.9\cdot 10^{-5}}{1.2\cdot 10^{-5}}=1.58~\frac{kg}{m^3},

λ=3Dv=31.2105380=94.7 nm.\lambda=\frac{3D}{v}=\frac{3\cdot 1.2\cdot 10^{-5}}{380}=94.7~nm.


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