5. A 100 g cube of aluminum originally at 120°C is placed into an insulated cont

Question

5. A 100 g cube of aluminum originally at 120°C is placed into an insulated container of water originally at 18°C. After some time the system reaches equilibrium, and the final tempera ture of the water is 22°C. What is the final temperature of the aluminum cube? (A) It is greater than 22°C. (B) It is equal to 22°C. (C) It is less than 220C. D) It could be more or less than 22°C, depending on the mass of water present. 7. A 1 kg block of ice at 0°C is placed into a perfectly insulated. sealed container that has 2 kg of water also at 0°C. The water and ice completely fill the container, but the container is flexi- ble. After some time one can expect that (A) the water will freeze so that the mass of the ice will in- crease. (B) the ice will melt so that the mass of the ice will de- crease. (C) both the amount of water and the amount of ice will re- main constant. (D) both the amount of water and the amount of ice will 5 Work Done on or by an Ideal Gas In which of the paths between initial state i and final statefin Fig, 23-25 is the work done on the gas the greatest?

Explanation / Answer

Here ,

5) at the equilibrium , as the temperature of all will be same

the correct option is B)

7) Here , as there is no temperature difference and no flow of heat

the state of mixture will not change

the correct option is C)

8) as the work done is area under the curve

work done is greatest in path D

9) for gas to not do work

A , B , D

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