what is the net work for an adiabatic control volume with an inlet and outlet water mass flow rate of 2.8 kg/s, an inlet enthalpy of 0.089 kj/kg, an outlet enthalpy of 0.075 kj/kg, and no change in elevation? the inlet an outlet are both circular conduits with diameters of 0.028 m and 0.15 m, respectively.