Posted by **Rachel** on Sunday, October 5, 2008 at 7:45pm.

Are there two ways of calculating the average kinetic energy of a molecule?

Ik that 1/2mv^2 works

but for this problem, i don't know the mass or the velocity....

- Chemistry/physics -
**bobpursley**, Sunday, October 5, 2008 at 7:46pm
Use temperature.

- Chemistry/physics -
**bobpursley**, Sunday, October 5, 2008 at 7:51pm
average KE of a molecule is a function of temperature, that relation is in your book. The exact function depends on the type of molecule.

- Chemistry/physics -
**bobpursley**, Sunday, October 5, 2008 at 8:06pm
http://hyperphysics.phy-astr.gsu.edu/Hbase/kinetic/kintem.html

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