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what is the free mean path of methane molecule at 298 K and 7×10^-4 torr? give...

what is the free mean path of methane molecule at 298 K and 7×10^-4 torr? give answer in meters

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Answer #1

Mean free path is related to temperature and pressure by:

d = average diameter of a molecule = 0.3 nm

P = 7 x 10-4 = 0.0933 Pa

therefore, .

this is the mean free path at the given temperature and pressure.

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