1.

If one mole of a monoatomic gas gamma =(5)/(3), is mixed with one mole of diatomic gas gamma =(7)/(5), what is the value of gamma for the mixture ?

Answer»

`(3)/(2)`
`(5)/(2)`
`(6)/(5)`
`(8)/(5)`

Solution :AVERAGE `C_(v) =((3)/(2)R+(5)/(2)R)/(2)=2R`.
Average `C_(p) =C_(v)+R =2R +R =3R`
`therefore" Average "GAMMA =(3R)/(2R) =(3)/(2) =1.5`
`therefore` Correct choice is (a).


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