A saturated liquid–vapor H₂O mixture enters a 25-mm-inner-diameter tube at a temperature of 490 K with a quality of 0.95. The mixture is heated at constant pressure as it travels through the tube and exits as a saturated vapor. The average velocity of the mixture entering the tube is 10 m/s. Show the entering and exit states on a T–v diagram. Determine the average velocity the steam at the tube exit.