First slide

Law of equipartition of energy

Question

What is the ratio of the total energy of all the molecules of one mole of $O_{2}$ to the total energy of all the molecules of two moles of helium at the same temperature?

Easy

A

1 : 2
B

2 : 1
C

2 : 3
D

3 : 2

Solution

$\frac{E_{1}}{E_{2}} = \frac{N \times \frac{3}{2} kT}{2 N \times \frac{3}{2} kT} = \frac{1}{2}$

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