Which, if any, is/are valid forms of the Second Law of Thermodynamics?

False]In summary, the statements discussed in the conversation revolve around the second law of thermodynamics, specifically the impossibility of a device that only extracts heat and performs work in a cycle, the increase of entropy in naturally occurring processes, and the relationship between energy inputs and outputs. The last statement, stating that all of the above statements are true, is incorrect because the statement about the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir is true.
  • #1
ss883
5
0
What I answered is in brackets...what did I answer incorrectly?

  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the extraction of heat from a reservoir and the performance of an equivalent amount of work. [True]
  • For all naturally occurring processes, Sgen > 0. [True]
  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a lower-temperature reservoir to a higher-temperature reservoir. [True]
  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]
  • Ein - Ein = ∆Esystem [False]
  • For all naturally occurring processes, Sgen ≤ 0. [False]
  • All of the above statements are true. [False]
 
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  • #2
ss883 said:
What I answered is in brackets...what did I answer incorrectly?

  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the extraction of heat from a reservoir and the performance of an equivalent amount of work. [True]
  • For all naturally occurring processes, Sgen > 0. [True]
  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a lower-temperature reservoir to a higher-temperature reservoir. [True]
  • It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]
  • Ein - Ein = ∆Esystem [False]
  • For all naturally occurring processes, Sgen ≤ 0. [False]
  • All of the above statements are true. [False]
[*] It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]

I think this one is the problem.
 

Related to Which, if any, is/are valid forms of the Second Law of Thermodynamics?

1. What is the Second Law of Thermodynamics?

The Second Law of Thermodynamics is a fundamental principle in physics that states that the total entropy of a closed system will always increase over time, or at best, remain constant. It also states that heat will always flow from a hotter object to a colder object, and that it is impossible to convert all heat energy into work.

2. What are the two main forms of the Second Law of Thermodynamics?

The two main forms of the Second Law of Thermodynamics are the Clausius statement and the Kelvin-Planck statement. The Clausius statement focuses on the direction of heat transfer and the concept of entropy, while the Kelvin-Planck statement focuses on the efficiency of heat engines.

3. Is there a debate about the validity of the Second Law of Thermodynamics?

Yes, there has been ongoing debate about the validity of the Second Law of Thermodynamics, particularly in regards to its application to open systems. Some argue that exceptions to the law can be found in certain systems, such as biological systems, while others maintain that the law holds true universally.

4. How does the Second Law of Thermodynamics relate to the concept of disorder?

The Second Law of Thermodynamics is often associated with the concept of disorder or entropy. Entropy is a measure of the disorder or randomness of a system, and the Second Law states that the total entropy of a closed system will always increase over time, leading to an increase in disorder.

5. Can the Second Law of Thermodynamics be violated?

No, the Second Law of Thermodynamics is a fundamental principle that has been extensively tested and has never been found to be violated. It is considered a law of nature and is an essential aspect of our understanding of the physical world.

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