Q1. When 3.0 kg of water is warmed from 10∘C to 80∘C, how much heat (q) is needed? Round to two significant figures.
Hint: Cs of water = 4.184 J/g⋅∘C
Q2. A calorimeter contains 100 g of water at 39.8∘C. An 8.23 g metal object (whose temperature is 50.0∘C) is placed inside the calorimeter. When equilibrium has been reached, the new temperature of the water and the metal is 40.0C∘. What type of metal is the object made from?
Hints: (1) Cs of water = 4.184 J/g⋅∘C, (2) solve for the specific heat capacity of the unknown metal, and (3) use the table of Specific Heat Capacity of Common Substances Actions to identify the metal.
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