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Nitrogen is a diatomic gas. Its molar sp...

Nitrogen is a diatomic gas. Its molar specific heat a constant volume is very nearly:

A

`(5R)/(2)`

B

`(7R)/(2)`

C

`(3R)/(2)`

D

(a) and (b) (c) depending on the temperature.

Text Solution

Verified by Experts

The correct Answer is:
D
We know that `C_(v) =(f)/(2) RT` and degree of freedom for a diatomic gas varies with temperature
`f=3" for "T le 70 k`.
`f=5" for "250 k le T le 750 k`
`f=7" for "T ge 750 k`
Thus, correct choice is (d).
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