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8 moles of oxygen and 4 moles of nitrogen are at same temperature T and are mixed. The total internal energy is

Option 1 -

60RT  

Option 2 -

15RT

Option 3 -

30RT

Option 4 -

90RT

0 1 View | Posted 6 days ago
Asked by Shiksha User

  • 1 Answer

  • Correct Option - 3


    Detailed Solution:

    U = nCvT

    -> U = n 1 C v 1 T + n 2 C v 2 T  

    -> 8 * 5 R 2 * T + 4 * 5 R 2 * T

    = 30RT

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