Applying the Energy BalanceAs shown in Fig. P3.90, a

QUESTION:

As shown in Fig. P3.90, a closed, insulated tank contains \(0.15 \mathrm{~kg}\) of liquid water and has a \(0.25-\mathrm{kg}\) copper base. The thin walls of the container have negligible mass. Initially, the tank and its contents are all at \(30^{\circ} \mathrm{C}\). A heating element embedded in the copper base is energized with an electrical current of \(10 \mathrm{amps}\) at 12 volts for 100 seconds. Determine the final temperature, in \({ }^{\circ} \mathrm{C}\), of the tank and its contents. Data for copper and liquid water are provided in Table A- 19.