## Entropy：A concept that is not Physical Quantity

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zhshfeng
Posts: 3
Joined: Sun Apr 25, 2010 5:23 am

### Entropy：A concept that is not Physical Quantity

Entropy：A concept that is not Physical Quantity

shufeng-zhang China
Email:uhsgnahz@126.com
This paper demonstrate entropy is not a physical quantity.
We define heat engine efficiency η as: η= W/W1, that is, replacing Q1 in the original definition η=W/Q1 with W1, W still is the net work of the heat engine applied to the outside in one cycle, W1 is the work the heat engine applied to the outside in the cycle, then, we use Stirling cycle as the element reversible cycle , if ∮dQ/T =0 is tenable, we can prove ∮dW/T =0 and ∮dE/T =0.
If the formula ∮dQ/T=0, ∮dW/T=0 and ∮dE/T=0 can really define new system state variables, it comes to the absurd result of such a definition.
In fact, during the process of obtaining “entropy”, ∑[(ΔQ)/T)] become∫dQ/T is untenable, therefore, the formula ∮dQ/T=0, ∮dW/T=0 and ∮dE/T=0 are untenable.
The“entropy”defined by Boltzmann is used to interpret “entropy” by Clausius, so, it is at the same time denied.

http://www.yudu.com/item/details/234797 ... l-Quantity

cesascencio
Posts: 7
Joined: Tue Jun 28, 2011 8:25 pm

### Re: Entropy：A concept that is not Physical Quantity

zhshfeng wrote:Entropy：A concept that is not Physical Quantity

shufeng-zhang China
Email:uhsgnahz@126.com
This paper demonstrate entropy is not a physical quantity.
We define heat engine efficiency η as: η= W/W1, that is, replacing Q1 in the original definition η=W/Q1 with W1, W still is the net work of the heat engine applied to the outside in one cycle, W1 is the work the heat engine applied to the outside in the cycle, then, we use Stirling cycle as the element reversible cycle , if ∮dQ/T =0 is tenable, we can prove ∮dW/T =0 and ∮dE/T =0.
If the formula ∮dQ/T=0, ∮dW/T=0 and ∮dE/T=0 can really define new system state variables, it comes to the absurd result of such a definition.
In fact, during the process of obtaining “entropy”, ∑[(ΔQ)/T)] become∫dQ/T is untenable, therefore, the formula ∮dQ/T=0, ∮dW/T=0 and ∮dE/T=0 are untenable.
The“entropy”defined by Boltzmann is used to interpret “entropy” by Clausius, so, it is at the same time denied.

http://www.yudu.com/item/details/234797 ... l-Quantity

Hmmm...to my knowledge entropy was never claimed to be a physical quantity and has always been regarded as a statistical quantity. It is a compressed version of the number of possible configurations a system can realize. Please let me know what you think.

gloriacollins
Posts: 9
Joined: Tue Jul 05, 2011 12:29 am

### Re: Entropy：A concept that is not Physical Quantity

Consider the sum of dQ/T = 0 at the given temp
so there is no work and heat loss

i.e

∑[(ΔQ)/T)] =0, so ∮dQ/T=0, ∮dW/T=0 and ∮dE/T=0.
This means that ∑(Q) = 0 for any isothermal cyclic process. No heat is formed and no work is consumed, so this is a reversible process. Why do you maintain that this is "unsustainable"?