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Chemistry

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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 - ,

    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 - ,

    1.63E-27 photon/sec

  • Chemistry - ,

    220

  • Chemistry - ,

    1000/(1.6*10^-24) =
    6.25*10^26 photons/sec

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