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Assertion (A): All constant entropy processes are adiabatic, but all adiabatic processes are not isentropic.
Reason (R): An adiabatic process which resists the exchange of energy to the surroundings may have irreversibility due to friction and heat conduction.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is NOT the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Assertion (A): All constant entropy processes are adiabatic, but all a...
A is false, For a process due to irreversibility entropy will increase and actual process may be 1–2' but due to heat loss to the surroundings, may 2' coincide with 2 but the process not adiabatic. So, all isentropic process is not adiabatic.
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Assertion (A): All constant entropy processes are adiabatic, but all a...
Assertion (A): All constant entropy processes are adiabatic, but all adiabatic processes are not isentropic.
Reason (R): An adiabatic process which resists the exchange of energy to the surroundings may have irreversibility due to friction and heat conduction.
Explanation:
An adiabatic process is one in which there is no exchange of heat between the system and its surroundings. It means that there is no heat transfer occurring during the process. On the other hand, an isentropic process is one in which the entropy remains constant. In other words, the entropy of the system does not change during the process.
Constant entropy processes are adiabatic:
A constant entropy process is one in which the entropy of the system remains constant. This implies that there is no change in entropy during the process. Since entropy is a measure of the system's disorder, a constant entropy process indicates that the system remains in a state of constant disorder. In order to maintain constant entropy, there should not be any heat transfer during the process. Therefore, all constant entropy processes are adiabatic.
Not all adiabatic processes are isentropic:
While all constant entropy processes are adiabatic, the reverse is not true. An adiabatic process is one in which there is no heat transfer between the system and its surroundings. However, this does not necessarily mean that the entropy of the system remains constant. An adiabatic process may still have irreversibility due to factors such as friction and heat conduction. These irreversibilities can cause a change in the entropy of the system, resulting in an adiabatic process that is not isentropic.
Conclusion:
Based on the above explanation, it can be concluded that Assertion (A) is false. While all constant entropy processes are adiabatic, not all adiabatic processes are isentropic. The reason (R) given for this assertion is true. An adiabatic process can have irreversibility due to friction and heat conduction, which can cause a change in the entropy of the system. Therefore, Reason (R) is true but it does not provide a correct explanation for Assertion (A).
Reason (R): An adiabatic process which resists the exchange of energy to the surroundings may have irreversibility due to friction and heat conduction.
Explanation:
An adiabatic process is one in which there is no exchange of heat between the system and its surroundings. It means that there is no heat transfer occurring during the process. On the other hand, an isentropic process is one in which the entropy remains constant. In other words, the entropy of the system does not change during the process.
Constant entropy processes are adiabatic:
A constant entropy process is one in which the entropy of the system remains constant. This implies that there is no change in entropy during the process. Since entropy is a measure of the system's disorder, a constant entropy process indicates that the system remains in a state of constant disorder. In order to maintain constant entropy, there should not be any heat transfer during the process. Therefore, all constant entropy processes are adiabatic.
Not all adiabatic processes are isentropic:
While all constant entropy processes are adiabatic, the reverse is not true. An adiabatic process is one in which there is no heat transfer between the system and its surroundings. However, this does not necessarily mean that the entropy of the system remains constant. An adiabatic process may still have irreversibility due to factors such as friction and heat conduction. These irreversibilities can cause a change in the entropy of the system, resulting in an adiabatic process that is not isentropic.
Conclusion:
Based on the above explanation, it can be concluded that Assertion (A) is false. While all constant entropy processes are adiabatic, not all adiabatic processes are isentropic. The reason (R) given for this assertion is true. An adiabatic process can have irreversibility due to friction and heat conduction, which can cause a change in the entropy of the system. Therefore, Reason (R) is true but it does not provide a correct explanation for Assertion (A).
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Assertion (A): All constant entropy processes are adiabatic, but all adiabatic processes are not isentropic.Reason (R): An adiabatic process which resists the exchange of energy to the surroundings may have irreversibility due to friction and heat conduction.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is NOT the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'D'. Can you explain this answer?
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