Comment on the law of entropy increase in thermodynamics

2012 ◽  
Vol 34 (1) ◽  
pp. 83-94 ◽  
Author(s):  
Pier A Mello ◽  
Rosalío F Rodríguez
Keyword(s):  
Entropy ◽  
2022 ◽  
Vol 24 (1) ◽  
pp. 83
Author(s):  
Alexey Nikulov

The law of entropy increase postulates the existence of irreversible processes in physics: the total entropy of an isolated system can increase, but cannot decrease. The annihilation of an electric current in normal metal with the generation of Joule heat because of a non-zero resistance is a well-known example of an irreversible process. The persistent current, an undamped electric current observed in a superconductor, annihilates after the transition into the normal state. Therefore, this transition was considered as an irreversible thermodynamic process before 1933. However, if this transition is irreversible, then the Meissner effect discovered in 1933 is experimental evidence of a process reverse to the irreversible process. Belief in the law of entropy increase forced physicists to change their understanding of the superconducting transition, which is considered a phase transition after 1933. This change has resulted to the internal inconsistency of the conventional theory of superconductivity, which is created within the framework of reversible thermodynamics, but predicts Joule heating. The persistent current annihilates after the transition into the normal state with the generation of Joule heat and reappears during the return to the superconducting state according to this theory and contrary to the law of entropy increase. The success of the conventional theory of superconductivity forces us to consider the validity of belief in the law of entropy increase.


2016 ◽  
Vol 54 (6) ◽  
pp. 348-350 ◽  
Author(s):  
William Dittrich ◽  
Robert Drosd ◽  
Leonid Minkin ◽  
Alexander S. Shapovalov

1997 ◽  
Vol 89 (3-4) ◽  
pp. 801-816 ◽  
Author(s):  
Toshio Niwa

Author(s):  
Daniel V. Schroeder

Although the law of entropy increase governs the direction in which things change, we don’t observe entropy directly. Instead we observe three quantities—temperature, pressure, and chemical potential—that tell us how the entropy of a system changes as it interacts in three different ways with its surroundings. This chapter shows how these three quantities are mathematically related to a system’s entropy, energy, volume, and number of particles. These relations complete the foundation of macroscopic thermodynamics. Moreover, for the three model systems whose entropies are calculated explicitly in the previous chapter, these relations lead to detailed testable predictions of thermal behavior.


1996 ◽  
Vol 104 (13) ◽  
pp. 5165-5173
Author(s):  
Nobuo Yoshida
Keyword(s):  

1999 ◽  
Vol 54 (3) ◽  
pp. 650-651 ◽  
Author(s):  
L D Pustyl'nikov
Keyword(s):  

2015 ◽  
Vol 20 (3) ◽  
pp. 72-84 ◽  
Author(s):  
Paula Leslie ◽  
Mary Casper

“My patient refuses thickened liquids, should I discharge them from my caseload?” A version of this question appears at least weekly on the American Speech-Language-Hearing Association's Community pages. People talk of respecting the patient's right to be non-compliant with speech-language pathology recommendations. We challenge use of the word “respect” and calling a patient “non-compliant” in the same sentence: does use of the latter term preclude the former? In this article we will share our reflections on why we are interested in these so called “ethical challenges” from a personal case level to what our professional duty requires of us. Our proposal is that the problems that we encounter are less to do with ethical or moral puzzles and usually due to inadequate communication. We will outline resources that clinicians may use to support their work from what seems to be a straightforward case to those that are mired in complexity. And we will tackle fears and facts regarding litigation and the law.


1998 ◽  
Vol 7 (2) ◽  
pp. 17-19
Author(s):  
I. Campbell-Taylor
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document