(a) A water pump has an inlet conditions of 1.82 MPa and 100oC. The outlet of the pump is at a pressure of 7.40 MPa. What is the enthalpy change across a reversible pump in kJ/kg? (b) For a real system, which of the following pumps might be considered for the job?

5.53 kJ/kg

5.82 kJ/kg

6.13 kJ/kg

(c) If a real pump for the states given in (a) has and efficiency of 0.8, what would be the enthalpy change of water through the pump?