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You are given an unknown substance with mass of 400.0 g. The unknown substance is heated...

You are given an unknown substance with mass of 400.0 g. The unknown substance is heated to a temperature of 97.0°C, and then dropped into a calorimeter that is at an initial temperature of 18.0°C. The calorimeter is composed of a 140.0 g aluminum inner cup and 10.0 g stirrer (also aluminum). The mass of the inner cup plus water is 340.0 g. When equilibrium is established, the temperature is 22.0°C. There are no phase changes.

1. What is the specific heat of the calorimeter, cc, in (cal/g C°)?

2. What is the specific heat of water, cw, in (cal/g C°)?

3. What is the mass of the water inside the inner cup?

4. What is the specific heat of the unknown substance?

5.What is the unknown substance?

a. steel b. glass c. copper d. lead

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