Water contained in a piston-cylinder assembly, initially at 300°F, a quality of 70%, and a volume of 6 ft3, is heated at constant temperature to saturated vapor. If the rate of heat transfer is 0.1 Btu/s, determine the time, in min, for this process of the water to occur. Kinetic and potential energy effects are negligible. Δt = i 55 min

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