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An insulated beaker with negligible mass contains liquid water with a mass of 0.275 kg and...

An insulated beaker with negligible mass contains liquid water with a mass of 0.275 kg and a temperature of 65.9 ∘C. How much ice at a temperature of -18.7 ∘C must be dropped into the water so that the final temperature of the system will be 34.0 ∘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 3.34×105 J/kg

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