Final answer:
Water is used as the working fluid in a Carnot vapor power cycle. It goes through four processes: boiler, turbine, condenser, and pump.
Step-by-step explanation:
In a Carnot vapor power cycle, water is used as the working fluid. The cycle consists of four processes: the boiler, the turbine, the condenser, and the pump. The working fluid begins as saturated liquid at high pressure and temperature in the boiler, where it absorbs heat to become saturated vapor. It then enters the turbine, where it expands and does work by driving the turbine. After leaving the turbine, the vapor is condensed back into liquid state in the condenser, releasing heat to the surroundings. Finally, the pump brings the liquid back to the boiler, completing the cycle.