Physics

Problem

A brass sphere of mass

0.50\,\text{kg}

150\,^{\circ}\text{C}

is gently placed in thermal contact with a copper sphere of mass

0.30\,\text{kg}

30\,^{\circ}\text{C}

inside a perfectly insulated enclosure. The specific heat capacities of brass and copper are

0.38\,\text{kJ}\,\text{kg}^{-1}\,\text{K}^{-1}

and

0.39\,\text{kJ}\,\text{kg}^{-1}\,\text{K}^{-1}

respectively. a. (i) Calculate the final common temperature attained by the two spheres. b. (ii) If a third body initially at that common temperature is now placed in contact with either sphere within the same enclosure, will any heat flow occur? Justify your answer.

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