Question

Q. Define mean free path and find an expression for it.

Answer 1

Answer:

Mean Free Path. ... The mean free path could then be taken as the length of the path divided by the number of collisions. The problem with this expression is that the average molecular velocity is used, but the target molecules are also movin

Answer 2

Answer:

Mean Free Path. ... The mean free path could then be taken as the length of the path divided by the number of collisions. The problem with this expression is that the average molecular velocity is used, but the target molecules are also moving

The expression for mean free path has been obtained by assuming that all the gas molecules except the one under consideration, are at rest. In fact, all the gas molecules are in random motion, their velocities being governed by Maxwell's law of distribition of velocities.

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