Verified Solution • 2025–26 Session moderate

QJEEM20Phb0fc: JEE Main 2020 Physics - Class 11 JEEM20Phb0fc Solution: Consider two ideal diatomic gases A and B at some temperature…

Consider two ideal diatomic gases A and B at some temperature T. Molecules of the gas A are rigid, and have a mass m. Molecules of the gas B have an additional vibrational mode, and have a mass m4 . The ratio of the specific heats (CVA and CVB ) of gas A and B, respectively is :

Multiple Choice Options

  • A 7:09
  • B 5:07
  • C 3:05
  • D 5:09

Step-by-Step Verified Solution

Degree of freedom of a diatomic molecule if vibration is absent = 5

Degree of freedom of a diatomic molecule if vibration is present = 7

∴ CVA = 52R

and CVB = 72R

∴ CVACVB=57

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