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jacobtwilliams001

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- Homework Statement
- There is a small uniform pressure gradient in an ideal gas at constant

temperature, so that there is a mass flow in the direction of the gradient. Using the mean

free path approach show that the rate flow of mass in the direction of the pressure

gradient per unit of area and per unit pressure gradient is mv(average)l/3kT.

- Relevant Equations
- mean free path: l=1/n*sigma

mass of flow rate: m^degree=rho*V*A

Kinetic Theory:

PV=NkT

NkT=1/3*Nm*v(average)^2

1/2*m*v(average)^2=3/2*kT

I am able to find and understand T from kinetic theory, but I do not understand how to use pressure gradient per unit of area and per unit pressure gradient.