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20 February, 03:59

Find the number of photons of wavelength = 5.49*10-6 m that must be absorbed to melt 1.00 g of ice.

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  1. 20 February, 04:41
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    First, we determine the energy required to melt one gram of ice. This is given by:

    Energy = mass * latent heat of fusion

    Energy = 1 g * 334 J/g

    Energy = 334 J

    Next, we use Planck's equation which is:

    Energy = number of photons * Planck's constant * speed of light / wavelength

    334 = n * 6.64 x 10⁻³⁴ * 3 x 10⁸ / 5.49 x 10⁻⁶

    n = 9.20 x 10²¹

    9.20 x 10²¹ photons need to be absorbed by the ice.
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