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Kinetic Theory of Gases

Mean free pat...

Question

Mean free path is defined as –

A

The mean distance travelled between two successive collisions

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B

The number of molecules participating in a collision

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C

The closest distance between centers of two molecules

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D

None of the above

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Solution

The correct option is A
The mean distance travelled between two successive collisions

This is the definition of mean free path.

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Q. Estimate the number of collision per second suffered by a molecule in a sample of hydrogen at STP. The mean free path (average distance covered by a molecule between successive collisions)

= 1.38 \times 10^{- 5} c m

Q. Estimate the number of collisions per second suffered by a molecule in a sample of hydrogen at STP. The mean free path (average distance covered by a molecule between successive collisions) = 1.38 × 10⁻⁵ cm.

Q. In physics, the mean free path is the average distance traveled by a moving particle (such as an atom , a molecule, a photon) between successive impacts (collisions), which modify its direction or energy or other particle properties. In which of the following mean free path is used ?

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