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AMU Medical AMU Solved Paper-2013

  • question_answer
    A vessel contains a mixture of 1 mole of oxygen and two moles of nitrogen at 300 K. The ratio of the rotational kinetic energy per \[{{O}_{2}}\]molecule to that per \[{{N}_{2}}\] molecule is

    A)  1 : 2                                      

    B)  2 : 1

    C)  1 : 1

    D)  depends on the moment of inertia of the two molecules

    Correct Answer: C

    Solution :

                     Both \[{{O}_{2}}\] and \[{{N}_{2}}\] are diatomic gases. Rotational degree of freedom in both cases is two. Therefore average rotational kinetic energy per molecule for each of them is \[2\left( \frac{1}{2}KT \right)\] or the ratio is 1 : 1.


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