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Assertion: Molar specific heat at consta...

Assertion: Molar specific heat at constant volume of an ideal diatomic gas is `[(3)/(2)R+R]`.
Reason: On heating `1` mole an ideal diatomic gas at constant pressure of `1^(@)C` rise in temperature, the increase in internal energy of gas is `(7)/(2)R`.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
A
Average energy of diatomic molecule is `(5)/(2)RT` at constant `V`.
`:.` Average energy of diatomic molecule `=(7)/(2)RT`
`:.` Increase in internal energy `=(7)/(2)R(T+1)`
`=(7)/(2)RT=(7)/(2)R`
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