As shown in Fig. P3.89, a tank open to the atmosphere
Chapter 3, Problem 3.89(choose chapter or problem)
As shown in Fig. P3.89, a tank open to the atmosphere initially contains 2 lb of liquid water at \(80^{\circ} \mathrm{F}\) and 0.4 lb of ice at \(32^{\circ} \mathrm{F}\). All of the ice melts as the tank contents attain equilibrium. If no significant heat transfer occurs between the tank contents and their surroundings, determine the final equilibrium temperature, in \(^{\circ} \mathrm{F}\). For water, the specific enthalpy change for a phase change from solid to liquid at \(32^{\circ} \mathrm{F}\) and 1 atm is 144 Btu/lb.
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