An irreversible motor operates between reservoirs at Th = 550 K and Tc = 350 K, with an efficiency of 25%. In each cycle heat Qh = 1200 J is extracted from the reservoir at temperature Th, and this heat is added to the working substance in the motor. The heat |Qc| is taken from the motor to the reservoir at temperature Tc. A) Determine the change in entropy of the universe for one cycle of operation B) How much more work could be done by a reversible motor operating between these reservoirs, with the same heat input for each cycle? Justify C) Show that for each cycle, the amount of work that becomes unavailable due to the irreversibility of the process is equal to TcΔSuniverse
An irreversible motor operates between reservoirs at Th = 550 K and Tc = 350 K, with an efficiency of 25%. In each cycle heat Qh = 1200 J is extracted from the reservoir at temperature Th, and this heat is added to the working substance in the motor. The heat |Qc| is taken from the motor to the reservoir at temperature Tc. A) Determine the change in entropy of the universe for one cycle of operation B) How much more work could be done by a reversible motor operating between these reservoirs, with the same heat input for each cycle? Justify C) Show that for each cycle, the amount of work that becomes unavailable due to the irreversibility of the process is equal to TcΔSuniverse
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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An irreversible motor operates between reservoirs at Th = 550 K and Tc = 350 K, with an efficiency of 25%. In each cycle heat Qh = 1200 J is extracted from the reservoir at temperature Th, and this heat is added to the working substance in the motor. The heat |Qc| is taken from the motor to the reservoir at temperature Tc.
A) Determine the change in entropy of the universe for one cycle of operation
B) How much more work could be done by a reversible motor operating between these reservoirs, with the same heat input for each cycle? Justify
C) Show that for each cycle, the amount of work that becomes unavailable due to the irreversibility of the process is equal to TcΔSuniverse
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