First slide

Law of equipartition of energy

Question

In a jar having a mixture of H₂ and He

Easy

A

Hydrogen has more mean KE per molecule
B

Helium has more mean KE per molecule
C

Both have same mean KE per molecule
D

Both have same internal energy

Solution

Average K.E. per molecules of an ideal gas = 1/2 fKT.
At ordinary temperature, f = 5 for H₂ and f = 3 for He.

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