4. An area of 2 m2 is covered by a 2 cm layer of ice. How much
heat did the frozen water of the party release?
Heat released
= m
mass of the ice m = density and volume
density of ice at 0 degree celsius = 916 kg/m^3
volume of the ice = 2*0.02 = 0.04 m^3
mass of the water m = 916*0.04 = 36.64 kg
Heat releases
= m
=
36.64 * 3.35*105 = 122.744 * 105 J = 12.27 *
106 J
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