Kinetic Energy of Electrons to moles?  [ENDORSED]

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Matthew_Vargas_2G
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Joined: Fri Jul 22, 2016 3:00 am

Kinetic Energy of Electrons to moles?

Postby Matthew_Vargas_2G » Fri Oct 07, 2016 11:33 pm

How do you find the kinetic energy per mole of electron? I know you use avogadro's number but I'm not entirely sure how to do it properly with units.

Xinyi_Yan_3L
Posts: 21
Joined: Wed Sep 21, 2016 2:56 pm

Re: Kinetic Energy of Electrons to moles?  [ENDORSED]

Postby Xinyi_Yan_3L » Sat Oct 08, 2016 10:50 pm

To know the kinetic energy of the electrons, you need to know both their mass and velocity. According to the formula:
E(k)=(1/2)m*v^2
The mass of one mole of electrons is 9.1*10^-31kg * 6.02*10^23/mol(Avogadro's number) * 1mol. And the unit of v^2 is (m/s)^2, the unit of the final answer is:
kg*m^2/(s^2)=N*m=J
(Actually the unit concerning "energy" is "Joule" for most of the time.)


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