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At what temperature will the molar kinet...

At what temperature will the molar kinetic energy of 0.3 mol of He be the same as that of 0.4 mol of argon at 400 K ?

A

(a) `700 K`

B

(b) `500 K`

C

(c) `800 K`

D

(d) `400 K`

Text Solution

Verified by Experts

`KE=(3)/(2)nRT`
`n=1`, for molar kinetic energy
`((3)/(2)xx1xxRxxT)_(Helium)=((3)/(2)xx1xxRxx400)_(Argon)`
`T=400 K`
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