First slide

Law of equipartition of energy

Question

If the adiabatic index $γ$ of a gas is 4/3, the gas may be

Easy

A

$H e$
B

$H_{2}$
C

$N H_{3}$
D

$O_{2}$

Solution

$\frac{f + 2}{f} = γ$ where f = number of degrees of freedom
$∴ \frac{f + 2}{f} = \frac{4}{3} \Rightarrow f = 6 \Rightarrow$ Polyatomic non-linear.

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