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An 11 g ice cube at -12˚C is put into a Thermos flask containing 145 cm3...

An 11 g ice cube at -12˚C is put into a Thermos flask containing 145 cm3 of water at 24˚C. By how much has the entropy of the cube-water system changed when a final equilibrium state is reached? The specific heat of ice is 2200 J/kg K and that of liquid water is 4187 J/kg K. The heat of fusion of water is 333 × 103 J/kg.

and

A 6.0 g ice cube at -21˚C is put into a Thermos flask containing 120 cm3 of water at 24˚C. By how much has the entropy of the cube-water system changed when a final equilibrium state is reached? The specific heat of ice is 2200 J/kg K and that of liquid water is 4187 J/kg K. The heat of fusion of water is 333 × 103 J/kg.

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