2.An ideal gas (the weight is m kg) in an idealized piston-cylinder assembly undergoes a series ofprocesses from state 1 to states 2, 3 and 4. Each state is at equilibrium. The gas can be modeled as a closedsystem. Ignore changes of KE and PE. The states are fixed by the following properties in the table:State1234879Note: State 1 to 2 is a constant-temperature process. State 2-3 is a constant-volume process. State 3-4 is aconstant-temperature process.(a) Mark the states 1-4 and draw the three processes (1-2, 2-3, 3-4) on the following p-v diagram.p (bar)4 531 20p (bar)13163v (m³/kg)31122300K600KT (K)3003006006003 4 5v (m³/kg)6 7 8(b) Use equations and simple texts to explain and answer the questions for the two processes (process 1-2, andprocess 2-3), respectively.(i) How does the internal energy change during each process: no change, increase or decrease (AU)?(ii) How does the enthalpy change during each process (AH)?(iii) Is the work negative, positive or zero during each process (W)?(iv) Is the heat transfer negative, positive or zero during each process (Q)?

Answered: Image /qna-images/answer/ee40151c-475f-4188-9181-72e4635adeee.jpg

2. An ideal gas (the weight is m kg) in an idealized piston-cylinder assembly undergoes a series of processes from state 1 to states 2, 3 and 4. Each state is at equilibrium. The gas can be modeled as a closed system. Ignore changes of KE and PE. The states are fixed by the following properties in the table: State p (bar) 1 2 3 4 8 Note: State 1 to 2 is a constant-temperature process. State 2-3 is a constant-volume process. State 3-4 is a constant-temperature process. (a) Mark the states 1-4 and draw the three processes (1-2, 2-3, 3-4) on the following p-v diagram. 5 tz 3 2 J 0 p (bar) 1 3 6 3 1 v (m³/kg) 3 1 1 2 2 300K 600K T (K) 300 300 600 600 3 4 5 v (m³/kg) 6 7 8 (b) Use equations and simple texts to explain and answer the questions for the two processes (process 1-2, and process 2-3), respectively. (i) How does the internal energy change during each process: no change, increase or decrease (AU)? (ii) How does the enthalpy change during each process (AH)? (iii) Is the work negative, positive or zero during each process (W)? (iv) Is the heat transfer negative, positive or zero during each process (Q)?

2. An ideal gas (the weight is m kg) in an idealized piston-cylinder assembly undergoes a series of processes from state 1 to states 2, 3 and 4. Each state is at equilibrium. The gas can be modeled as a closed system. Ignore changes of KE and PE. The states are fixed by the following properties in the table: State p (bar) 1 2 3 4 8 Note: State 1 to 2 is a constant-temperature process. State 2-3 is a constant-volume process. State 3-4 is a constant-temperature process. (a) Mark the states 1-4 and draw the three processes (1-2, 2-3, 3-4) on the following p-v diagram. 5 tz 3 2 J 0 p (bar) 1 3 6 3 1 v (m³/kg) 3 1 1 2 2 300K 600K T (K) 300 300 600 600 3 4 5 v (m³/kg) 6 7 8 (b) Use equations and simple texts to explain and answer the questions for the two processes (process 1-2, and process 2-3), respectively. (i) How does the internal energy change during each process: no change, increase or decrease (AU)? (ii) How does the enthalpy change during each process (AH)? (iii) Is the work negative, positive or zero during each process (W)? (iv) Is the heat transfer negative, positive or zero during each process (Q)?

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

2.
An ideal gas (the weight is m kg) in an idealized piston-cylinder assembly undergoes a series of
processes from state 1 to states 2, 3 and 4. Each state is at equilibrium. The gas can be modeled as a closed
system. Ignore changes of KE and PE. The states are fixed by the following properties in the table:
State
1
2
3
4
8
7
9
Note: State 1 to 2 is a constant-temperature process. State 2-3 is a constant-volume process. State 3-4 is a
constant-temperature process.
(a) Mark the states 1-4 and draw the three processes (1-2, 2-3, 3-4) on the following p-v diagram.
p (bar)
4 5
3
1 2
0
p (bar)
1
3
1
6
3
v (m³/kg)
3
1
1
2
2
300K
600K
T (K)
300
300
600
600
3 4 5
v (m³/kg)
6 7 8
(b) Use equations and simple texts to explain and answer the questions for the two processes (process 1-2, and
process 2-3), respectively.
(i) How does the internal energy change during each process: no change, increase or decrease (AU)?
(ii) How does the enthalpy change during each process (AH)?
(iii) Is the work negative, positive or zero during each process (W)?
(iv) Is the heat transfer negative, positive or zero during each process (Q)?

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