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JEE Main 20202 SeptemberMorning Shift
Exam
JEE Main
Year
2020
Date
2 September
Shift
Morning Shift
Subject
Physics
Chapter
Kinetic Theory of Gases

JEE Main 2020 · 2 September · Morning Shift · Physics · Kinetic Theory of Gases

A gas mixture consists of 3 moles of oxygen and 5 moles of argon at...

A gas mixture consists of 33 moles of oxygen and 55 moles of argon at temperature TT. Assuming the gases to be ideal and the oxygen bond to be rigid, the total internal energy (in units of RTRT) of the mixutre is :

Options

  1. A1515
  2. B1313
  3. C2020
  4. D1111

Correct answer

A. 1515

Step-by-step solution

f1n1RT12+f2n2RT22\dfrac{{f}_{1}{n}_{1}R{T}_{1}}{2} + \dfrac{{f}_{2}{n}_{2}R{T}_{2}}{2}

=3×52RT+52×3RT=15= 3 \times \dfrac{5}{2}RT + \dfrac{5}{2} \times 3RT = 15

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