Atank having a volume of 0.85 m3 initially contains water as a two-phase liquid-vapor mixture at 260oc and a quality of 0.7. saturated water vapor at 260oc is slowly withdrawn through a pressure-regulating valve at the top of the tank as energy is transferred by heat to maintain the pressure constant in the tank. this continues until the tank is filled with saturated vapor at 260oc. determine the amount of heat transfer, in kj. neglect all kinetic and potential energy effects.