Question

7. Steam leaves an industrial boiler at 827.4kPa and 171.6°C (hf = 727.25 kJ/kg, hfg = 2043.2 kJ/kg ). A portion of the steam

10. Water enters the heater at 25°C and leaves at 80°C. Whatif the temperature change in F? 11. The suction pressure of a pum

13. 2.5 liters of superheated steam at 25 bar and 400°C (V = 0.1252 m3/kg ) is expanded in an engine to a pressure of 0.1 bar

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Answer #1

727.25 +(2043.2) = 2707.6 ..niskuse content, % 0.969 = ht ( 0.4682 = ..0 = 1.354 Specific molas entropy change = ds = Open -P,= 8 bar Up = mW= 0) (0.94 x 0.2404) 0.226 m3 P2 = a bar W, = m2 = 0) (x x 0.4625) = 6.4625 * m> =) pulit? = constant = (0-2

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