: A-Steam enters a turbine with a velocity of 40 m/s and specific enthalpy 2990 kJkg . the steam leaves the turbine with a velocity of 25 m/s and specific enthalpy 1300 kJ/kg. the heat los tothe surroundings as the steam passes through the turbine is 25 kJ/kg .the steam flow rate 32400kg/h determine the work output from the turbine in kilowatts.

1. Steam is supplied to a fully loaded 100 hp turbine at 200 psia with u, = 1160 BTU/lb, v, = 2.6 ft/lb and v1 = 380 ft/s. Exhaust is at 1.1 psia with uz = 900 BTU lb., v2 = 1200 ft/s. The heat loss from the steam in the turbine is 10.5 BTU.lb. Neglect the potential energy change and determine: a. the work per Ib steam b. the steam flow rate in Ib/hour 2. An ideal gas (R = 2,075 J/kg K and k = 1.659) goes through a reversible constant pressure process where 525 kJ o heat are added to 2.3 kg of the gas. The initial temperature of the gas is 310 K. Compute for the following: a. final temperature, T2 b. non-flow work Wn c. change in entropy AS d. flow work Assume AP = AK = 0) 3. A 3.6 kg. mass of air goes through an isothermal process with a temperature of 305 OK. The initial and final pressure of the air are 550 kPa and 135 kPa respectively. Compute for: a. steady flow work, Wf b. non-flow work Wn c. change in internal energy AU d. Heat transferred, Q e. change in entropy, AS

1. A rigid tank whose volume is 10 liters is initially evacuated. A pinhole develops in the wall, and air from the surroundings at 1 bar, 25C enters the pressure in the tank becomes 1 bar. No significant heat transfer beween the contents of the tank and the surroundings occur. Assuming the ideal gas model with y 1.4 for the air, determine: (a) final temperature in the tank (b) amount of air that leaks into the tank

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