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2 mol 'H(2) is mixed with 2 gm of H(2)....

`2 mol` `'H_(2)` is mixed with `2 gm ` of `H_(2)`. The molar heatr capacity at constant pressure for the mixture is

A

`(17R)/(6)`

B

`(11R)/(6)`

C

`4R`

D

`(3R)/(2)`

Text Solution

Verified by Experts

`C_(P_(1))` for `'He'=(5)/(2)R`: `C_(P_(2))` for `H_(2)=(7)/(2)R`
`n_(He)=2`, `n_(H_(2))=1`
`C_(P)=(n_(1)C_(P_(1))+n_(2)C_(P_(1)))/(n_(1)+n_(2))=(2xx(5)/(2)R+1xx(7)/(2)R)/(3)`
`=(17R)/(6)`
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