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Collision frequency (Z) of a gas at a pa...

Collision frequency (Z) of a gas at a particular pressure

A

decreases with the rise in temperature

B

increases with the rise in temperature

C

decreases initially and thereafter increases

D

unpreductable

Text Solution

Verified by Experts

The correct Answer is:
B
Collision frequency = Collisions which all molecules undergo in a unit volume per second
`= (1)/(2)` collision no. `xx N//V`
or `Z = (1)/(2) sqrt2 pi bar(v) sigma^(2) N//V xx N//V`
`= (1)/(sqrt2) pi bar(v) sigma^(2) ((N^(2))/(V^(2)))`
or `Z prop T` since `bar(v) prop T`
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