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The molar heat capacity at constant volu...

The molar heat capacity at constant volume of oxygen gas at STP is nearly `(5R)/2` and it approaches `(7R)/2` as the temperature is increased. This happens because at higher temperature

A

Oxygen becomes triatomic

B

Oxygen does not behaves as an ideal gas

C

Oxygen molecules rotate more vigorously

D

Oxygen molecules start vibrating

Text Solution

Verified by Experts

The correct Answer is:
D
At higher temperature, vibration are important and that affect the values of `C_P` and `C_V` .
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