Reversible heat engine works between 300k and 600k the heat output is 200kj heat input is
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A reversible heat engine operates between 300K and 600K. If heat output is 200 kJ, what is the heat input?
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Ram Kumar
Ram Kumar, student at SRM Institute of Science and Technology (2014-present)
Answered Oct 13
For a reversible heat engine, efficiency is expressed as
1-(T2/T1) = 1- (Q2/Q1)
2 represents sink, where heat is rejected out.
Thus, in the given data, T1=600 K , (Source at higher temperature) T2 = 300 K (sink), heat rejected out , Q2 = 200kJ . So
Efficiency = 1-(0.5) = 0.5 = (Q1-Q2)/Q1. This gives heat input Q1 to be 400 kJ.
Hope it was clear to you!
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2 ANSWERS
Ram Kumar
Ram Kumar, student at SRM Institute of Science and Technology (2014-present)
Answered Oct 13
For a reversible heat engine, efficiency is expressed as
1-(T2/T1) = 1- (Q2/Q1)
2 represents sink, where heat is rejected out.
Thus, in the given data, T1=600 K , (Source at higher temperature) T2 = 300 K (sink), heat rejected out , Q2 = 200kJ . So
Efficiency = 1-(0.5) = 0.5 = (Q1-Q2)/Q1. This gives heat input Q1 to be 400 kJ.
Hope it was clear to you!
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Answer:
Correct answer is 400kj ........
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Explanation:
Efficiency = 1 - T1 / T2 = 1 - Q2 / Q1
=> 1 - 300 / 600 = 1 - 200 / Q1
=> - 1 / 2 = - 200 / Q1
=> Q1 = 400 KJ ......
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