Steam at 260ºC and 7.00 bar absolute is adiabatically expanded through a nozzle to 200ºC and 4.00 bar. The velocity of the steam entering the nozzle is negligible. The specific enthalpy of steam is 2974 kJ/kg at 260ºC and 7 bar and 2860 kJ/kg at 200ºC and 4 bar. Use the open-system energy balance to calculate the exit steam velocity.