Steam at 260 °C and 7 bar absolute is expanded through a nozzle to 200 °C and 4 bar absolute. Negligible heat is transferred from the nozzle to its surroundings. The entering velocity of the steam is...

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Extracted text: Steam at 260 °C and 7 bar absolute is expanded through a nozzle to 200 °C and 4 bar absolute. Negligible heat is transferred from the nozzle to its surroundings. The entering velocity of the steam is also negligible. The specific enthalpy of steam is 2,974 kJ/kg at 260 °C and 7 bar and 2,860 kJ/kg at 200 °C and 4 bar. Sketch a diagram to represent the process and use the open-system energy balance to calculate the exit steam velocity.