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Amrutha T posted an Question
July 08, 2020 • 19:42 pm 30 points
  • IIT JAM
  • Physics (PH)

6. a and b are both classical ideal gases of diatomic molecules. the point-like atoms in a are bounded rigidly to form diatomic molecules while in b they are co

6. A and B are both classical ideal gases of diatomic molecules. The point-like atoms in A are bounded rigidly to form diatomic molecules while in B they are connected by bonds of finite stiffness. The ratio of the specific heat per molecule at constant volume of gas A to gas B is (a) 1 (c) 6/5 (b) 5/7 (d) 3/4 LISc-20101

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    Amrutha t

    please explain how did u get 6 degree of freedom for B

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    in B atoms are not rigid so they can translate ,,rotate and can also vibrate about their positions so 3 trans,2 rotational and 1 vibrarational degree of freedom

  • Mahak Best Answer

    ans is b because in A there are 5 degre of freedom where 3 translation and 2 rotational so Cv=5/2 kt and in b there are 6 degree of freedom where 3 trans ,2 rotational and 1 vibra so E= 5/2kt +kt=7/2kt so Cv=7/2 kt so ratio is 5/7

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