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An insulated beaker with negligible mass contains liquid water with a mass of 0.250 kg and a temperature of 84.4 ∘c .
how much ice at a temperature of -10.6 ∘c must be dropped into the water so that the final temperature of the system will be 21.0 ∘c ?
take the specific heat of liquid water to be 4190 j/kg⋅k , the specific heat of ice to be 2100 j/kg⋅k , and the heat of fusion for water to be 3.34×10^5 j/kg .
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