Question 1 2 pts Steam at 250°C and 10.0 bar is expanded through a nozzle to 200°C and 5.0 bar. Negligible heat is transferred from the nozzle to its surroundings. The approach velocity of the steam is negligible. The flow rate of the steam is 9 kg/sec. Use the open-system energy balance to calculate the exit stream velocity (m/s).