A student heats a 25-g sample of lead metal to 65°C. This sample is immediately clamped in contact with a 47-g sample of magnesium metal. The original temperature of the magnesium was 25°C. No heat was lost to the surroundings during the experiment. The specific heat of lead metal is 0.127 J/g °C, and the specific heat of magnesium metal is 1.024 J/g °C. The finaltemperature of both metals was 27°C. What is one possible conclusion the student might postulate from this experiment?  

A.
The lead lost more heat than the magnesium gained.
B.
The lead lost the same amount of heat as the magnesium gained.
C.
The lead lost less heat than the magnesium gained.
D.
The student made an error because the final temperature should be the average (45°C).
Chemistry
AP
College Board
Exam No:AP Chemistry Practice Test Year:2024 Question No:APChemistry2024AP0375

Answer:

B

Knowledge points:

6.4 Heat Capacity and Calorimetry

Solution:

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