 #1
jacobtwilliams001
 1
 0
 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.