0.25 kg of air at a pressure of 21 bar occupies a volume of 0.03 m' in a cylinder behind a piston. If this air expands Polytropically to a volume of 0.27 m' according to the law PV13 C, Find: a. Work done by or on the system. b. Increase or decrease in internal energy. c. Heat absorbed or rejected by air. d. Increase or decrease in entropy.

0.25 kg of air at a pressure of 21 bar occupies a volume of 0.03 m' in a cylinder behind a piston. If this air expands Polytropically to a volume of 0.27 m' according to the law PV13 C, Find: a. Work done by or on the system. b. Increase or decrease in internal energy. c. Heat absorbed or rejected by air. d. Increase or decrease in entropy.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Concept explainers

Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

0.25 kg of air at a pressure of 21 bar occupies a volume of 0.03 m in a cylinder behind a piston. If
this air expands Polytropically to a volume of 0.27 m' according to the law PV13 C, Find:
a. Work done by or on the system.
b. Increase or decrease in internal energy.
c. Heat absorbed or rejected by air.
d. Increase or decrease in entropy.

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