Problem-4: When a system is taken from a state-a to a state-b, the figure along path a-c-b, 84 kJ of heat flow into the system, and the system does 32 kJ of work. (i) How much will the heat that flows into the system along the path a-d-b be, if the work done is 10.5 kJ? (Answer: 62.5 k) (ii) When the system is returned from b to a along the curved path, the work done on the system is 21 kJ. Does the system absorb or liberate heat, and how much? (Answer:-73 kJ) (iii) If Ua =0 and U, = 42kJ , find the heat absorbed in the processes ad and db. (Answer: 52.5 kJ, 10 kJ)

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
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lail - Ahmed Amro Hussein Ali A x n Course: EN7919-Thermodynamic x
Homework Problerns(First Law)_S x
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Problem-4: When a system is taken from a state-a to a state-b,
the figure along path a-c-b, 84 kJ of heat flow into the system,
and the system does 32 kJ of work.
(i) How much will the heat that flows into the system along the
path a-d-b be, if the work done is 10.5 kJ? (Answer: 62.5 kJ)
(ii) When the system is returned from b to a along the curved path, the work done on
the system is 21 kJ. Does the system absorb or liberate heat, and how much?
(Answer:-73 k])
(iii) If Ua = 0 andU, = 42kJ , find the heat absorbed in the processes ad and db.
(Answer: 52.5 kJ, 10 kJ)
Transcribed Image Text:lail - Ahmed Amro Hussein Ali A x n Course: EN7919-Thermodynamic x Homework Problerns(First Law)_S x noodle/pluginfile.php/168549/mod_resource/content/1/Homework%20Problems%28First%20Law%29_SOLUTIONS.pdf UTIONS.pdf 4 / 4 100% Problem-4: When a system is taken from a state-a to a state-b, the figure along path a-c-b, 84 kJ of heat flow into the system, and the system does 32 kJ of work. (i) How much will the heat that flows into the system along the path a-d-b be, if the work done is 10.5 kJ? (Answer: 62.5 kJ) (ii) When the system is returned from b to a along the curved path, the work done on the system is 21 kJ. Does the system absorb or liberate heat, and how much? (Answer:-73 k]) (iii) If Ua = 0 andU, = 42kJ , find the heat absorbed in the processes ad and db. (Answer: 52.5 kJ, 10 kJ)
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