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JEE Main 2021 (22 Jul, Shift 2) · Law of Equipartition of Energy

Law of Equipartition of Energy question from JEE Main 2021 (22 Jul, Shift 2)

Q2JEE Main 2021 · 22 JUL · SHIFT 2Easy

Law of Equipartition of Energy

What will be the average value of energy for a monoatomic gas in thermal equilibrium at temperature T?

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Answer: (a)

  1. A monoatomic molecule has 3 translational degrees of freedom.
  2. Each carries 12kBT\dfrac{1}{2}k_BT, so E=3×12kBTE = 3 \times \dfrac{1}{2}k_BT.
  3. So the answer is (a) 32kBT\dfrac{3}{2}k_BT.
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