Cold water enters a steam generator at 20C, is vaporized at 165C and exits as a superheated vapor at 350C. The steam generator operates at constant pressure. Determine the following: a. the heat input to the generator (kJ/kg of steam produced) b. the fraction of the input heat used to i. preheat the liquid feed water to the saturation temperature of 165C ii. evaporate the water iii. superheat the water vapor to its final exit temperature.