## Solving Equations using E=hv

$E=hv$

Lusin_Yengibaryan_2A
Posts: 45
Joined: Wed Sep 30, 2020 9:33 pm

### Solving Equations using E=hv

How would you go about finding the frequency of a mole of photons given the energy of the said mole of photons?

Posts: 83
Joined: Wed Sep 30, 2020 9:32 pm
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### Re: Solving Equations using E=hv

I would assume that you could use $E=h\nu$ as you would with the frequency of a single photon because the frequency per photon gives you the energy per photon, so the frequency per mole should give you the energy per mole. The Js^-1 unit for Planck's constant should cancel with the J for the energy, and the s^-1 should cancel with the s^-1 of the frequency. That leaves the moles^-1 (per mole) unit from the energy and the frequency which will also cancel with each other. So you should be able to divide the given energy per mole of photons by Planck's constant to get the frequency per mole of photons.

Hope this helps!

Lung Sheng Liang 3f
Posts: 37
Joined: Wed Sep 30, 2020 9:33 pm

### Re: Solving Equations using E=hv

Hello,

To find the frequency of photons you would generally use E=hv or C=lambda(v). Frequencies of one photon and one mole of photons are the same. To convert moles into number of photons or number of photons into moles just use Avogadro's constant.

Jacob Schwarz
Posts: 31
Joined: Wed Sep 30, 2020 10:01 pm

### Re: Solving Equations using E=hv

You would solve normally using E=hv and then divide by Avogadro's constant