A well-insulated copper tank of mass 13 kg contains 4 kg of liquid water. Initially, the temperature of the copper is 27C and the temperature of the water is 50C. An electrical resistor of neglible mass transfers 100 kJ of energy to the contents of the tank. The tank and its contents come to equilibrium. What is the final temperature, in C?
A steel bar (AISI 316) of mass 50 lb, initially at 200F, is placed in an open tank together with 5 ft3 of liquid water, initially at 70F. For the water and the bar as the system, determine the final equilibrium temperature, in F, ignoring heat transfer between the tank and its surroundings.
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