A monatomic gas is kept at room temperat...

A monatomic gas is kept at room temperature 300 K. Calculate the average kinetic energy of gas molecule. (Use K = 1.38 x `10^(-23)` M.K.S. units)

A

0.138eV

B

0.062eV

C

0.039eV

D

0.013eV

Verified by Experts

The correct Answer is:

C

`K = f/2 k_B T = 3/2 k_B T`
[as f = 3, for monoatomic]
` = 3/2 xx ((1.38 xx 10^(-23))xx300)/(1.6 xx 10^(-19)) eV`
` = 3.9 xx 10^(-2) eV = 0.039eV.`

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