Question

An insulated beaker with negligible mass contains liquid water with a mass of 0.315 kg and a temperature of 78.7 ∘C . How much ice at a temperature of -21.2 ∘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 3.34×105 J/kg .

Answer 1

:0315 (YAO)(q84-ai) =午6155315丁 6651 o ml.