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Two flask A and B of equal volumes main...

Two flask A and B of equal volumes maintained at temperature `300K` and `700K` contain equal mass of `He(g)` and `N_(2)(g)` respectively. What is the ratio of total translational kinetic energy of gas in flask A to that of flask B ?

A

`1 : 3`

B

`3 : 1`

C

`3 : 49`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Molar ratio `= (n_(He))/(n_(N_(2))) = (W//4)/(W//28) = (7)/(1)`, Ratio of transitional K.E. `= (n_(He): T_(He))/(n_(N_(2)). T_(N_(2))) = (7)/(1) xx (300)/(700) = 3 : 1`
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