# Poiseuille’s equation for the flow of a gas through a tube is different from that of an…

Poiseuille’s equation for the flow of a gas

through a tube is different from that of an incompressible liquid. If the gas

is assumed to be ideal, the equation for the molar rate of flow is^{10}

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where we now use r for the radius of the tube and R for the ideal gas constant,

and where n is the number of moles of the gas that has passed through the tube.

Find the time required for 0.100 mol of carbon dioxide to flow through a tube

of length 40.0 cm and diameter 0.850 mm at 20.0◦C.