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The entropy change for any closed system which undergoes an irreversible adiabatic process
- a)may be positive, negative or zero
- b)may be positive or zero but not negative
- c)is always positive
- d)is always negative
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The entropy change for any closed system which undergoes an irreversib...
As we shall see in the following examples, the change in entropy for a system and its surroundings is always positive for an irreversible process. In general, the total entropy - and therefore the disorder - always increase in an irreversible process. Keeping these considerations in mind, we can state the second law of thermodynamics as follows:
“The total entropy of an isolated system that undergoes a change can never decrease.”
Furthermore, if the process is irreversible, then the total entropy of an isolated system always increases. In a reversible process, the total entropy of an isolated system remains constant.
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The entropy change for any closed system which undergoes an irreversib...
Explanation:
Irreversible adiabatic process is a process in which there is no transfer of heat between the system and the surroundings, and the process is not reversible. The entropy change of a closed system undergoing such a process is always positive. This can be explained as follows:
First Law of Thermodynamics:
The first law of thermodynamics states that the change in internal energy of a closed system is equal to the heat added to the system minus the work done by the system. Mathematically, it can be expressed as:
ΔU = Q - W
where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.
Adiabatic Process:
In an adiabatic process, the heat transfer (Q) is zero, i.e., the system neither gains nor loses heat. Therefore, the first law of thermodynamics can be simplified as:
ΔU = -W
where W is the work done by the system.
Entropy:
Entropy is a measure of the degree of disorder or randomness in a system. The change in entropy of a closed system can be expressed as:
ΔS = Q/T
where ΔS is the change in entropy, Q is the heat added to the system, and T is the temperature.
For an adiabatic process, Q is zero, so the entropy change can be expressed as:
ΔS = 0/T = 0
Therefore, the change in entropy of a closed system undergoing an irreversible adiabatic process is always positive.
Irreversible adiabatic process is a process in which there is no transfer of heat between the system and the surroundings, and the process is not reversible. The entropy change of a closed system undergoing such a process is always positive. This can be explained as follows:
First Law of Thermodynamics:
The first law of thermodynamics states that the change in internal energy of a closed system is equal to the heat added to the system minus the work done by the system. Mathematically, it can be expressed as:
ΔU = Q - W
where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.
Adiabatic Process:
In an adiabatic process, the heat transfer (Q) is zero, i.e., the system neither gains nor loses heat. Therefore, the first law of thermodynamics can be simplified as:
ΔU = -W
where W is the work done by the system.
Entropy:
Entropy is a measure of the degree of disorder or randomness in a system. The change in entropy of a closed system can be expressed as:
ΔS = Q/T
where ΔS is the change in entropy, Q is the heat added to the system, and T is the temperature.
For an adiabatic process, Q is zero, so the entropy change can be expressed as:
ΔS = 0/T = 0
Therefore, the change in entropy of a closed system undergoing an irreversible adiabatic process is always positive.
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The entropy change for any closed system which undergoes an irreversible adiabatic processa)may be positive, negative or zerob)may be positive or zero but not negativec)is always positived)is always negativeCorrect answer is option 'C'. Can you explain this answer?
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