# Conservation of energy of an oxygen molecule

[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.

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

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

Thank you.

Shooting Star
Homework Helper
Eavg=3/2KbT
Oxygen molecule is a diatomic molecule. Therefore Eavg = 5/2kbT. Try this.
Oy. Forgot about that altogether. Thanks from me too.