Conservation of energy of an oxygen molecule

[jincy34]

[SOLVED] conservation of energy

Homework Statement

From what height must an oxygen molecule fall in a vacuum so that its kinetic energy at the bottom equals the average energy of an oxygen molecule at 200 K?

Homework Equations

conservation of energy
Eavg=3/2KbT
Epot=mgh

The Attempt at a Solution

I used conservation of energy and set
Epot.=Eavg. and got 7855.8 m. But it is wrong.

 

[Shooting Star]

What is the correct ans? This one seems to be right. Or my computer's not working.

 

[jincy34]

I get to see the answer only after it is due. It is due thursday. when i tried this answer, the computer says it is wrong.

 

[rl.bhat]

Eavg=3/2KbT
Oxygen molecule is a diatomic molecule. Therefore Eavg = 5/2kbT. Try this.

 

[jincy34]

Thank you.

 

[Shooting Star]

Eavg=3/2KbT
Oxygen molecule is a diatomic molecule. Therefore Eavg = 5/2kbT. Try this.

Oy. Forgot about that altogether. Thanks from me too.