How does the N signify the indistinguishability in the Gibbs Paradox?

In summary, Gibbs introduced the concept of N! to explain the extensive nature of S, attributing it to the indistinguishability of particles. This means that N indistinguishable particles can only be distributed over N 'locations' in one way, while N distinguishable particles have N! ways of distribution. This is relevant in deriving the Entropy, where we divide by N!. It is worth noting that in quantum mechanics, particles are indistinguishable and any information lost in this process is only spurious and physically nonexistent.
  • #1
annaphys
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Gibbs introduced the N! to then make S extensive. He then attributed the N! to the particles being indistinguishable. How does the N! signify the indistinguishability?
 
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  • #2
You can distribute N distinguishable particles over N 'locations' in N! ways.
You can distribute N indistinguishable particles over N 'locations' in one way only.
 
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  • #3
Nice. Thanks. That makes sense since in deriving the Entropy, we divide by N!. A side question. Are we losing any information of the system by doing this? Of course in quantum mechanics particles are indistinguishable but it'd be interesting to know if any information is lost.
 
  • #4
annaphys said:
Are we losing any information of the system by doing this? Of course in quantum mechanics particles are indistinguishable but it'd be interesting to know if any information is lost.
Lost is only spurious information that is physically nonexistent anyway.
 
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1. How does the N value represent indistinguishability in the Gibbs Paradox?

The N value in the Gibbs Paradox represents the number of particles in a system. In this context, it signifies the indistinguishability of particles because it assumes that all particles in the system are identical and cannot be differentiated from one another.

2. Why is indistinguishability important in the Gibbs Paradox?

Indistinguishability is important in the Gibbs Paradox because it is a fundamental concept in statistical mechanics. It allows us to treat particles as identical entities and simplifies the mathematical calculations involved in understanding the behavior of a system with a large number of particles.

3. How does the N value affect the entropy in the Gibbs Paradox?

The N value affects the entropy in the Gibbs Paradox because it is directly related to the number of microstates that a system can have. As the number of particles increases, the number of possible microstates also increases, leading to a higher entropy value.

4. What is the significance of the Gibbs Paradox in thermodynamics?

The Gibbs Paradox is significant in thermodynamics because it highlights the limitations of classical thermodynamics in dealing with systems with a large number of particles. It also led to the development of statistical mechanics, which provides a more accurate description of the behavior of such systems.

5. How does the Gibbs Paradox relate to the concept of entropy?

The Gibbs Paradox is closely related to the concept of entropy because it deals with the increase in entropy when two identical systems are combined. It also highlights the importance of considering indistinguishability when calculating entropy, as it can significantly affect the results.

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