question_answer

Two bodies at different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] , if brought in thermal contact do not necessarily settle at the mean temperature \[({{T}_{1}}+{{T}_{2}})/2.\] Why?

Answer:

              The two bodies may have different masses and different materials i.e., they may have different thermal capacities. In case the two bodies have equal thermal capacities they would settle at the mean temperature \[({{T}_{1}}+{{T}_{2}})/2\]