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  1. Steam flows through a nozzle at mass flow rate of m = 0.1 kg/s with a heat loss of 5 kW. The enthalpies at inlet and exit are 2500 kJ/kg and 2350 kJ/kg, respectively. Assuming negliglble velocty at inlet (C1~ 0), the velocity (C2) of steam (in m/s) at the nozzle exit is _______(correct to two deeimal places)
    1. 4471m/s
    2. 444.213 m/s
    3. 357.213 m/s
    4. 447.213 m/s
Correct Option: D

m 0.1 kg/ s, Q 5 kW (heat loss)

Applying SFEE

h1 +
1
1 + gz1 + Q̇ = ṁh2 +
1
2 + gz2 + ẆCV
22

C1 = 0 and ẆCV = 0
z1 = z2(assume)
ṁh1 + Q = ṁh2 + ṁ1/2 C²2
⇒ ṁ ×
1
2 = ṁ(h1 - h2) + Q̇
2

C2 = 447.213 m/s



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