A cup contains 500 g water initially at a temperature of 100oC. This cup is put in a large
room of temperature of 20oC.
a/ What will be the temperature of the water if the cup stays in the room for a long time? Explain your
answer.
b/ Compute the change of entropy of the system water – room, knowing that the heat capacity of water is
4186 J/(kg. K).
Answers: 3
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A cup contains 500 g water initially at a temperature of 100oC. This cup is put in a large
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