A heated piece of metal at a temperature T1 is placed into a calorimeter contain

Question

A heated piece of metal at a temperature T1 is placed into a calorimeter containing water and a stirrer. The temperature of the calorimeter, water, and stirrer is initially T2 where T1 > T2. The system is stirred continuously until it comes to equilibrium at a temperature of T3.

(Pick one)
1. The final equilibrium temperature of the system is such that
T3 > T1 > T2
T1 < T2 < T3
T1 < T3 < T2
T1 > T3 > T2

(Pick one)
2. The heat lost by the metal ?Qm and the heat gained by the calorimeter system ?Qc obey which of the following relationships?
?Qm > ?Qc
?Qm < ?Qc
?Qm = ?Qc

3. What is the purpose of stirring the system continuously?

Explanation / Answer

1) T1> T3>T2 2) According to method of mixtures heat lost by hot body is equal to heat gained by the cold body. Then Qm = Qc 3) To distribute heat equally to all parts of the calorimeter it is because of this reason we stir the system continously.

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