In an experiment, 190 g of aluminum (with a specific heat of 900 J/kg-K) at 53.0°C is mixed with 81.0 g of water (with a specific heat of 4186 J/kg-K) at 13.0°C, with the mixture thermally isolated. (a) What is the equilibrium temperature? What are the entropy changes of (b) the aluminum, (c) the water, and (d) the aluminum-water system?

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Chapter4: The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 4.7CYU: Check Your Understanding A 50-g copper piece at a temperature of 20 is placed into a large...
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In an experiment, 190 g of aluminum (with a specific heat of 900 J/kg-K) at 53.0°C is mixed with 81.0 g of water (with a specific heat of
4186 J/kg-K) at 13.0°C, with the mixture thermally isolated. (a) What is the equilibrium temperature? What are the entropy changes of
(b) the aluminum, (c) the water, and (d) the aluminum-water system?
(a) Number
Units
(b) Number
i
Units
(c) Number
Units
(d) Number
i
Units
>
>
>
Transcribed Image Text:In an experiment, 190 g of aluminum (with a specific heat of 900 J/kg-K) at 53.0°C is mixed with 81.0 g of water (with a specific heat of 4186 J/kg-K) at 13.0°C, with the mixture thermally isolated. (a) What is the equilibrium temperature? What are the entropy changes of (b) the aluminum, (c) the water, and (d) the aluminum-water system? (a) Number Units (b) Number i Units (c) Number Units (d) Number i Units > > >
A 30 g ice cube at -75°C is placed in a lake whose temperature is 87°C. Calculate the change in entropy of the cube-lake system as the
ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg-K. (Hint: Will the ice cube affect the
temperature of the lake?)
Number
i
Units
Transcribed Image Text:A 30 g ice cube at -75°C is placed in a lake whose temperature is 87°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg-K. (Hint: Will the ice cube affect the temperature of the lake?) Number i Units
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