HW 8.105

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Danah Albaaj 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

HW 8.105

Postby Danah Albaaj 1I » Fri Jan 19, 2018 12:22 am

Can someone help me with the final steps of this problem? I found the heat for water using q=mCdeltaT, but I'm not sure what I'm supposed to do with the given information regarding the photon's wavelength. I know I have to use Avogadro's constant, but each combination I try is not the answer of 2.49 x 10^27 photons.

Thank you!

Hannah Krusenoski 2L
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

Re: HW 8.105

Postby Hannah Krusenoski 2L » Fri Jan 19, 2018 1:35 am

After finding the heat for the water you also have to find the amount of energy needed for each photon using E=hc/ λ. After you find the energy in J/photon you divide the heat of the water by the energy of each photon to get the number of photons.


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