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Question 31005
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Kinetic Theory and Thermodynamics: Temperature and KE MCQ

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Temperature and KEMediumQuestion 31005

Question

Average kinetic energy of a molecule of an ideal gas at temperature T is:
  1. A
    kT
  2. B
    ½kT
  3. C
    (3/2)kT
    Correct
  4. D
    (5/2)kT

Correct answer

(3/2)kT

Explanation

For 3 translational degrees of freedom: KE_avg = (3/2)kT where k = Boltzmann constant = 1.38×10⁻²³ J/K.

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