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.
20 February, 04:41
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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» Find the number of photons of wavelength = 5.49*10-6 m that must be absorbed to melt 1.00 g of ice.