JEE Main 2019 Physics question
The specific heats, and of a gas of diatomic molecules, A, are given (in units of J mol K) by 29 and 22, respectively. Another gas of diatomic molecules, B, has the corresponding values 30 and 21. If they are treated as ideal gases, then:
Answer: (C)
Solution
Degrees of freedom : A ≈ 5.3 (> 5, vibration contributes), B ≈ 5.05 (rigid).