A student is using an apparatus to perform an investigation. The two calorimeters contain equal amounts of water, and the metal bar is touching the water inside each calorimeter. At the beginning of the investigation, the temperature of the water was 100 degrees Celsius in calorimeter A and 20 degrees Celsius in calorimeter B. The room temperature is 20 degrees Celsius.
Here is the question:
If this were a closed system, what would be the temperature when the system reaches equilibrium?
(1) 100 degrees Celsius
(2) 75 degrees Celsius
(3) 60 degrees Celsius
(4) 40 degrees Celsius
