Thermodynamics and Energy

1505 Submissions

[6] viXra:1505.0161 [pdf] submitted on 2015-05-23 00:03:25

Energy Nonconservation Experimental Facts Ignored by Millikan in 1916

Authors: Fei Tan
Comments: 5 Pages.

Basing on analyses for the data of photoeffect, observed by Millikan in 1916, this paper finds that the energy in the photoeffect are not conservative obviously nearby the cutoff frequency, and that the scales of the nonconservative energy fit quantitatively the theoretical prediction in 2013. The causes that the energy nonconservation phenomenon was ignored by Millikan in 1916 are: (1). The wrong measurement made by Millikan’s assistant for the relative intensity of the spectrum of his mercury lamp; (2). Absolute belief for the energy con-servation law in any cases.
Category: Thermodynamics and Energy

[5] viXra:1505.0108 [pdf] submitted on 2015-05-13 18:16:33

The Gravitational Heat Exchanger

Authors: Fran De Aquino
Comments: 5 Pages.

The heat exchangers are present in many sectors of the economy. They are widely used in Refrigerators, Air-conditioners, Engines, Refineries, etc. Here we show a heat exchanger that works based on the gravity control. This type of heat exchanger can be much more economic than the conventional heat exchangers.
Category: Thermodynamics and Energy

[4] viXra:1505.0093 [pdf] submitted on 2015-05-12 05:34:43

The Thermodynamics of Time

Authors: Rodrigo de Abreu
Comments: 9 Pages. Vértice 66/Maio-Junho, 23 (1995).

We connect the change of complex bodies (extended deformable bodies, not a particle) with the change of entropy, Thermodynamics with Time.
Category: Thermodynamics and Energy

[3] viXra:1505.0088 [pdf] submitted on 2015-05-11 10:18:00

Temperature as a Concept Derived from Energy and Entropy.

Authors: Rodrigo de Abreu
Comments: 17 Pages. Ciência & Tecnologia dos Materiais, Vol. 15, nº 1/2, 23 (2003).

Temperature is introduced as a derived concept from energy and entropy. We consider two sub-systems in equilibrium for several configurations. The equality of temperature of the sub-systems is obtained from the equilibrium condition. The isothermal transformation is defined for several configurations and from this definition we obtain the Clausius-Clapeyron equation. We apply the analysis to the ideal gas. The classical ideal gas appears as a limit and the problem of the measurement of temperature is analysed.
Category: Thermodynamics and Energy

[2] viXra:1505.0085 [pdf] submitted on 2015-05-11 07:27:49

About the Resolution of Some Conceptual Difficulties of Thermodynamics.

Authors: Rodrigo de Abreu
Comments: 28 Pages. Thermodynamics and Statistical Physics Teaching Modern Physics, Badajoz (Spain) 1992.

Our goal is to achieve in a condensed way, the resolution of some difficulties about the conceptual foundations of Thermodynamics-problematic ideas are identified and analysed. These difficulties have been presented and published in several and incompatible ways but the subject is still controversial. Why is this controversy still unsolved or-and this is stranger-why do some authors refuse the existence of difficulties although the existence of incompatible formulations is a fact? How can a resolution be obtained after the problem has been clearly identified? The difficulties and the solution considered are related to the followings concepts: 1. The several concepts of Heat. 2. The several concepts of Force. 3. The First Law and the concepts presented on points 1 and 2. 4. The several concepts of reversibility and the concept of quasi-static transformation. 5. The introduction of entropy in a simple and straightforward way with a physical interpretation to circumvent and clarify all the difficulties identified-we propose an energy-entropy principle.
Category: Thermodynamics and Energy

[1] viXra:1505.0064 [pdf] submitted on 2015-05-08 05:24:55

Resolution of Two Entropy Maximization Controversies.

Authors: Rodrigo de Abreu
Comments: 19 Pages. EPS-11:Trends in Physics, London (1999).

Irreversible interactions between two subsystems constituted by ideal gases are considered. Several processes conducting the gases to the final equilibrium point and the meaning of entropy production are analysed. If the interaction between the two subsystems results from the energy exchange through a fixed partition, it was demonstrated that the positive entropy production, the local law, is a consequence of the global entropy increase of the universe-it is not possible to have a negative entropy production. If the interaction results from the energy exchange netween the two subsystems through a moving partition it is not possible to define the entropy production generalising the expressions that can be attained for the first configuration. For the first case it is unnecessary. For the other it can not be defined. For the first case it gives a false interpretation [1, 2]. For the other it was the source of an impossibility statement that does not exist [3]. If this so, it is possible to understand what are the misconceptions and prejudices at the origin of two controversies [1-3]. [1] J. Belandria, J. Chem. Educ. 72, 116 (1995). [2] R. Battino, S. Wood, R. Freeman, L. Nash, W. Olivares, P. Colemenares, R. Tykody, J. Belandria, J. Chem. Educ. 74, 256 (1997). [3] A. Curzon and H. Leff, Am. J. Phys. 47, 385 (1979).
Category: Thermodynamics and Energy