A polyatomic gas with n degrees of freedom has a mean energy... | PHYSICS - MOLECULAR NATURE OF MATTER | SolveeIt | Solveeit

Today, August 19

Question

A polyatomic gas with n degrees of freedom has a mean energy per molecule given by

A

$\frac{nkT}{N}$

B

$\frac{nkT}{2N}$

C

$\frac{nkT}{2}$

D

$\frac{3kT}{2}$

(N is Avogadro's number)

Answer

$\frac{nkT}{2}$

Explanation

Solution

Mean kinetic energy per molecule $E = \frac{f}{2}kT = \frac{n}{2}kT$