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C (p) and C(V) are specific heats at...

`C _(p) and C_(V) ` are specific heats at constant pressure and constant volume respectively . It is observed that
` C_(p) - C_(v )=a ` for hydrogen gas
` C_(p) - C_(v) = b ` for nitrogen gas
The correct relation between a and b is

A

`a=(1)/(14) b`

B

`a=b`

C

`a=14b`

D

`a=28b`

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