5kg of liquid-vapor mixture of water is contained in a piston/cylinder device at 100°c. initially, 2 kg of the water is in the liquid phase. the piston is frictionless. heat is transferred to the water, and the piston which is resting on the stops, starts moving when the pressure inside reaches 200 kpa. heat transfer continues until the total volume increases by 20 %. a) show this process on p-v and t-v diagrams. b) determine the change in the internal energy, in kj, during each process. c) determine the work done, in kj, during each process.

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.