Water in a piston–cylinder assembly undergoes a carnot power cycle. at the beginning of the isothermal expansion, the temperature is 2508c and the quality is 80%. the isothermal expansion continues until the pressure is 2 mpa. the adiabatic expansion then occurs to a final temperature of 1758c. (a) sketch the cycle on t–s coordinates. (b) determine the heat transfer and work, in kj/kg, for each process. (c) evaluate the thermal efficiency.