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The root mean square speed of 8 g of He ...

The root mean square speed of 8 g of He is 300 `ms_(-1)`. Total kinetic energy of He gas is :

A

120 J

B

240 J

C

360 J

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
c
(c) `300=sqrt((3RT)/(4xx10^(-3)))," "RT=120`
Total K.E. of He gas`=(3)/(2)nRT`
`=(3)/(2)xx(8)/(4)xx120J`
`=360J`
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