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

Two flask A and B of equal volumes maintained at temperature 300 K and 700 K contain equal mass of He(g) and `N_(2)(g)` respectively. What is the ratio of 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:
2
Moles ratio `= (n_(He))/(n_(H_(2)))=(w//4)/(w//28)=(7)/(1)`
Ratio of translational `K.E.=(n_(He).T_(He))/(n_(N_(2)).T_(N_(2)))=(7)/(1)xx(300)/(700)=3:1`
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