A rigid, insulated tank fitted with a paddle wheel is filled with water, initially a two-phase liquid–vapor mixture at 20 lbf/in.2, consisting of 0.07 lb of saturated liquid and 0.07 lb of saturated vapor. The tank contents are stirred by the paddle wheel until all of the water is saturated vapor at a pressure greater than 20 lbf/in.2 Kinetic and potential energy effects are negligible. For the water, determine the (a) volume occupied, in ft3. (b) initial temperature, in °F. (c) final pressure, in lbf/in.2 (d) work, in Btu.