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JEE Main20202 Sep 2020Morning ShiftPhysicsKinetic Theory of GasesActual

A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T . Assuming the gases to be ideal and the oxygen bond to be rigid, the total internal energy (in units of R T ) of the mixutre is :

Options

  1. A15
  2. B13
  3. C20
  4. D11

Correct answer

A. 15

Step-by-step solution

f 1 n 1 R T 1 2 + f 2 n 2 R T 2 2 = 3 × 5 2 R T + 5 2 × 3 R T = 15

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