Question 2 (a) When a system is adiabatic, what can be said about the entropy change of the substance in the system? (5

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Question 2 (a) When a system is adiabatic, what can be said about the entropy change of the substance in the system? (5

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Question 2 A When A System Is Adiabatic What Can Be Said About The Entropy Change Of The Substance In The System 5 1
Question 2 A When A System Is Adiabatic What Can Be Said About The Entropy Change Of The Substance In The System 5 1 (73.19 KiB) Viewed 42 times
Question 2 (a) When a system is adiabatic, what can be said about the entropy change of the substance in the system? (5 marks) (b) Steam expands in a turbine steadily at a rate of 25,000 kg/h, entering at 6 MPa and 450°C and leaving at 20 kPa as saturated vapour. If the power generated by the turbine is 4 MW, determine: (i) the isentropic efficiency of the turbine. (10 marks) (ii) the rate of heat transfer to the surroundings. (5 marks) (iii) the rate of entropy generation for this process. Assume the surrounding medium is at 25°C. (5 marks) Total marks (25 marks)
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