A gas mixture consists of 3 moles of oxy...

A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. Considering only translational and rotational modes, the total internal energy of the system is :

15RT

12RT

20RT

4RT

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The correct Answer is:

KE of an ideal gas is given by `KE=(f)/(2)nRT= (5)/(2)xx3RT+(3)/(2)5RT= 15RT`.

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