Question

An insulated beaker with negligible mass contains liquid water with a mass of 0.235 kg and a temperature of 68.6 ∘C .

How much ice at a temperature of -20.0 ∘C must be dropped into the water so that the final temperature of the system will be 25.0 ∘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 .

Answer #1

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