## What is the eV unit? [ENDORSED]

$E=hv$

Toshio_Kanazawa_3B
Posts: 4
Joined: Wed Sep 21, 2016 2:58 pm

### What is the eV unit?

Hey everyone, so I don't exactly get what the electron volt unit means. I know it's used to describe work function values, but what exactly does it show?

Daniel_Callos_4I
Posts: 16
Joined: Wed Sep 21, 2016 2:57 pm

### Re: What is the eV unit?

Hey,
The electron volt is the amount of work (force over a distance) necessary to move an electron across an electrical pressure difference of one volt.

Hope this helps and happy chemistry!

-Dan Callos

Posts: 12
Joined: Wed Sep 21, 2016 2:56 pm

### Re: What is the eV unit?  [ENDORSED]

Also,

1 eV= 1.602x10(-19)Joules

1 J (Joule) =(1kg x m2 x s(-2))

Hope this helps!

sid bauer
Posts: 20
Joined: Wed Nov 16, 2016 3:04 am

### Re: What is the eV unit?

Also the term electron volt is self defining in that 1 eV is literally the charge of one electron times 1 Volt.
(1.6 x 10 ^-19 C) * (1 kg m^2 s^-2 C^-1) = 1.6 * 10^-19 J

In reality it is just about having ease of units more than anything else

Hope this helps!

Stef Newell
Posts: 20
Joined: Fri Sep 29, 2017 7:04 am

### Re: What is the eV unit?

eV is short for "electron volt" which is the amount of work required to move one electron through one volt of electrical pressure difference.

Courtney Cheney 3E
Posts: 19
Joined: Fri Sep 29, 2017 7:07 am

### Re: What is the eV unit?

Is it necessary to memorize the conversion $1eV=1.602 \times 10^{-19}$J?

Posts: 20
Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

### Re: What is the eV unit?

Courtney Cheney 3E wrote:Is it necessary to memorize the conversion $1eV=1.602 \times 10^{-19}$J?

Yes, I recommend that you memorize it since some problems in the book are in keV and eV. But that conversion you listed is given on the test anyway.