Chemistry, 12.09.2019 04:20 hei40563273
Aturbine operates on superheated steam that enters at 80 bar absolute and 500˚c, and leaves the turbine at 7.5 bar absolute and 250˚c. the flow rate of the steam is 400 kg/min and the turbine operates adiabatically. the steam exiting the turbine goes to a heater, which is supplied with 2000
2kw of energy. the steam leaves the heater at 5 bar absolute. all of the pipes through which the
steam flows are 0.5 m (id) in diameter.
a. how much power is produced by the turbine? (4 marks)
b. what is the temperature of the steam leaving the heater? (4 marks)
c. what is the velocity (m/s) of the steam entering the turbine? (3 marks)
d. to what temperature can the steam at 80 bar be cooled before a liquid will appear?
Answers: 1
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Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.
Answers: 3
Chemistry, 22.06.2019 14:30
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Chemistry, 22.06.2019 20:40
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Chemistry, 23.06.2019 06:50
The student repeated the experiment using a higher concentration of acid. the same volume of acid and the same mass of magnesium ribbon were used. what volume of hydrogen gas would have been produced after 60 seconds?
Answers: 1
Aturbine operates on superheated steam that enters at 80 bar absolute and 500˚c, and leaves the turb...
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