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Question:

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at 100oC, while the other one is at 0oC. If the two bodies are brought into contact, then assuming no heat loss, what is the final common temperature?

0oC

50oC

more than 50oC

less than 50oC but greater than 0oC

Solution:

Since the heat capacity increases with temperature, less temperature is dropped in the higher temperature body when an equal amount of heat is transferred from the lower temperature body, which rises more in temperature. Hence the final temperature is more than 50°C.