Homework Help: Chemistry

Posted by Kez on Monday, November 5, 2012 at 12:16am.

microwave ovens work by irradiating food with microwaves, which is absorbed by the water molecules in the food and is converted into heat. Assuming that microwave ovens emit radiation with a wavelength of 12.2cm, calculate how many photons are emitted per second in a 1000-Watt microwave oven.

Chemistry - DrBob222, Monday, November 5, 2012 at 11:55am
1000 watts = 1000 joules/second

E = hc/wavelength
E = 6.626E-34*3E8/12.2E-2 for one photon.
1.6E-24 J/photon x # photons = 1000 joules/sec.
Solve for # photons.
Chemistry - sara, Thursday, November 8, 2012 at 5:55am
1.63E-27 photon/sec

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