First slide

Law of equipartition of energy

Question

The average kinetic energy per mole of hydrogen at given temperature is [MP PMT 2013]

Moderate

A

equal to that of oxygen
B

16 times that of oxygen
C

$\frac{1}{16}$ times that of oxygen
D

$\frac{1}{8}$ times that of oxygen

Solution

For an ideal gas, the mean kinetic energy = $N_{A} \times (\frac{f}{2} k_{B} T) w h e r e f = n u m b e r o f d e g r e e s o f f r e e d o m o f m o l e c u l e s . F o r$
oxygen and Hydrogen , f = 5 ..

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