Answered: i) Sketch the cycle on a p-V diagram…

i) Sketch the cycle on a p-V diagram ii) Calculate the network for the cycle in kJ iii) Calculate the heat transfer for process 1-2 iv) Show that ƩW = ƩQ

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter3: Basic Theories And Math

Section: Chapter Questions

Problem 2RQ: In what four states does matter exist? Cite examples of each.

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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

2. A gas undergoes a thermodynamic cycle consisting of the following processes:
i) Process 1-2: Constant pressure p1 = 1.4 bar, V1=0.028 m3, W1-2=10.5 kJ
ii) Process 2-3: Compression with pV=Constant, U3=U2
iii) Process 3-1: Constant Volume, U1-U3 = -26.4 kJ
There are no significant changes in KE and PE
i) Sketch the cycle on a p-V diagram
ii) Calculate the network for the cycle in kJ
iii) Calculate the heat transfer for process 1-2
iv) Show that ƩW = ƩQ

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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P V Diagram

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heat transfer for process 1-2

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network for the cycle in kJ

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ƩW = ƩQ

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