A student immersed 200 pennies (each having a mass of 3 g) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.24 kg of water at 20°C in an insulated container of negligible mass. What was the final temperature of the coins? Pennies are made of a metal alloy—mostly zinc—with a specific heat capacity of 390 J/(kg • K). For water, c = 4.19 × 103 J/(kg • K).
A. 39.2 C
B. 35.1 C
C. 20.5 C
D.45.1 C
Answers: 1
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