Register to reply 
Equipartition Theorem (Thermal Physics) 
Share this thread: 
#1
Jul1113, 08:37 PM

P: 225

I just wanted to know whether the following formula 3/2kT=K (ave) demonstrates the average kinetic energy per atom in a monatomic gas.
And then if 5/2kT=K (ave) demonstrates the average kinetic energy per diatomic molecule. This comes from the fact that the average energy per degree of freedom is 1/2kT. Note k(lowercase) denotes Boltzmann Constant, and K (uppercase) denotes kinetic energy. 


#2
Jul1113, 10:03 PM

P: 220

Yes, you are correct. The equipartition theorem breaks down at low temperatures when the energy kT is smaller than the energy spacing in a degree of freedom. It doesn't have enough energy to make that jump, so that degree of freedom becomes frozen out.



Register to reply 
Related Discussions  
Equipartition theorem  Quantum Physics  2  
Equipartition theorem  Advanced Physics Homework  0  
Equipartition theorem  Classical Physics  2  
Equipartition theorem  Advanced Physics Homework  4  
About the equipartition theorem  Advanced Physics Homework  5 