A 20-Kg Block of Aluminum at 50°C Is Dropped into 5

question 33

Multiple Choice

A 2.0-kg block of aluminum at 50°C is dropped into 5.0 kg of water at 20°C and the temperature is allowed to stabilize. What is the total change in entropy during this process, assuming no heat is exchanged with the environment? The specific heat of aluminum is 910 J/(kg∙K) and the specific heat of water is 4190 J/(kg∙K) .

• A) 8.2 J/K
• B) 10 J/K
• C) 3.3 × 10^-2 J/K
• D) 3.8 × 10^-3 J/K
• E) 2.4 × 10^-3 J/K

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