Topical Questions
These questions are keyed to the major topics in this chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
One way to cool a cup of coffee is to plunge an ice-cold piece of aluminum into it. Suppose a 20.0-g piece of aluminum is stored in the refrigerator at 32 °F (0.0 °C) and then put into a cup of coffee. The coffee’s temperature drops from 90.0 °C to 75.0 °C. How much energy (in kilojoules) did the coffee transfer to the piece of aluminum?
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