During a complete cycle of an engine, the net internal energy change is 0. Durin

Question

During a complete cycle of an engine, the net
internal energy change is 0. During that cycle,
an amount of heat Qin enters the engine, an
amount Qout leaves the engine, and an amount
of work W is done. The following table lists
these quantities for a variety of engines.
Engine Qin Qout W
A 100 J 100 J 0 J
B 100 J 50 J 50 J
C 100 J 0 J 100 J
D 100 J 20 J 60 J
E 100 J 100 J 50 J

Which of these engines violates the second
law of thermodynamics?
1. D and E
2. only D
3. A, B and C
4. C and E
5. only C

Explanation / Answer

answer is only engine c violates the second
law of thermodynamics because there is no engine which can convert the complete energy in to work

engine have efficiency 1 it is not possible ( except ideal engine)

answer is 5

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.