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Which of the following is a property of entropy?
Select one or more:
Select one or more:
- a)Entropy increases during an irreversible operation
- b)Net change in entropy in a reversible cycle is zero
- c)Change in entropy during an adiabatic operation is zero
- d)None of the above
Correct answer is option 'A,B,C'. Can you explain this answer?
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Verified Answer
Which of the following is a property of entropy?Select one or more:a)E...
From second law of thermodynamics, (a) and (b) are true.
In adiabatic process, dQ = 0
⇒ dS = 0, hence (c) is also true.
The correct answers are: Entropy increases during an irreversible operation , Net change in entropy in a reversible cycle is zero, Change in entropy during an adiabatic operation is zero
In adiabatic process, dQ = 0
⇒ dS = 0, hence (c) is also true.
The correct answers are: Entropy increases during an irreversible operation , Net change in entropy in a reversible cycle is zero, Change in entropy during an adiabatic operation is zero
Most Upvoted Answer
Which of the following is a property of entropy?Select one or more:a)E...
Properties of Entropy:
a) Entropy increases during an irreversible operation:
- In an irreversible process, the system and its surroundings do not return to their original states after the operation is completed.
- The increase in entropy during an irreversible operation is a consequence of the second law of thermodynamics, which states that the total entropy of an isolated system always increases over time.
- Irreversible processes involve dissipative effects such as friction, heat transfer through a finite temperature difference, and irreversibilities in the system. These processes lead to an increase in disorder and randomness, reflected by an increase in entropy.
b) Net change in entropy in a reversible cycle is zero:
- A reversible cycle is a cycle of operations that can be reversed without leaving any trace on the system or its surroundings.
- In a reversible cycle, the system and its surroundings return to their initial states at the end of the cycle.
- Since the entropy is a state function, the change in entropy during a complete reversible cycle is zero. This means that any increase in entropy during one part of the cycle is balanced by a decrease in entropy during another part of the cycle.
c) Change in entropy during an adiabatic operation is zero:
- An adiabatic operation is one in which there is no heat transfer between the system and its surroundings.
- In an adiabatic process, the change in entropy is zero if the process is also reversible.
- This is because, in an adiabatic reversible process, there is no heat exchange, and hence, no change in entropy due to heat transfer. The change in entropy is solely determined by any work done or any changes in the system's internal energy.
In summary, entropy increases during irreversible operations due to the second law of thermodynamics. However, in reversible cycles and adiabatic reversible operations, the net change in entropy is zero because the system and its surroundings return to their initial states, and there is no heat transfer to contribute to the change in entropy.
a) Entropy increases during an irreversible operation:
- In an irreversible process, the system and its surroundings do not return to their original states after the operation is completed.
- The increase in entropy during an irreversible operation is a consequence of the second law of thermodynamics, which states that the total entropy of an isolated system always increases over time.
- Irreversible processes involve dissipative effects such as friction, heat transfer through a finite temperature difference, and irreversibilities in the system. These processes lead to an increase in disorder and randomness, reflected by an increase in entropy.
b) Net change in entropy in a reversible cycle is zero:
- A reversible cycle is a cycle of operations that can be reversed without leaving any trace on the system or its surroundings.
- In a reversible cycle, the system and its surroundings return to their initial states at the end of the cycle.
- Since the entropy is a state function, the change in entropy during a complete reversible cycle is zero. This means that any increase in entropy during one part of the cycle is balanced by a decrease in entropy during another part of the cycle.
c) Change in entropy during an adiabatic operation is zero:
- An adiabatic operation is one in which there is no heat transfer between the system and its surroundings.
- In an adiabatic process, the change in entropy is zero if the process is also reversible.
- This is because, in an adiabatic reversible process, there is no heat exchange, and hence, no change in entropy due to heat transfer. The change in entropy is solely determined by any work done or any changes in the system's internal energy.
In summary, entropy increases during irreversible operations due to the second law of thermodynamics. However, in reversible cycles and adiabatic reversible operations, the net change in entropy is zero because the system and its surroundings return to their initial states, and there is no heat transfer to contribute to the change in entropy.
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Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer?
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Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer?.
Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is a property of entropy?Select one or more:a)Entropy increases during an irreversible operationb)Net change in entropy in a reversible cycle is zeroc)Change in entropy during an adiabatic operation is zerod)None of the aboveCorrect answer is option 'A,B,C'. Can you explain this answer?.
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