Specific-Heat Anomaly and Calculation of the Configurational Entropy Change at the Phase Transition in Copper Formate Tetrahydrate

1967 ◽  
Vol 164 (2) ◽  
pp. 683-687 ◽  
Author(s):  
Kenkichi Okada
Keyword(s):  
Phase Transition ◽  
Specific Heat ◽  
Configurational Entropy ◽  
Entropy Change ◽  
Copper Formate

scholarly journals Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)13-H compounds

2015 ◽  
Vol 118 (5) ◽  
pp. 053907 ◽  
Author(s):  
Vittorio Basso ◽  
Michaela Küpferling ◽  
Carmen Curcio ◽  
Cecilia Bennati ◽  
Alexander Barzca ◽  
...  
Keyword(s):  
Phase Transition ◽  
Specific Heat ◽  
Order Phase Transition ◽  
Entropy Change ◽  
First Order ◽  
First Order Phase Transition ◽  
First Order Phase

Specific heat of KDP near the tetragonal-monoclinic phase transition

1989 ◽  
Vol 34 (1-2) ◽  
pp. 93-95 ◽  
Author(s):  
R VARGAS ◽  
M CHACON ◽  
J TROCHEZ
Keyword(s):  
Phase Transition ◽  
Specific Heat ◽  
Monoclinic Phase

scholarly journals New Phase Transition Related to the Black Hole’s Topological Charge

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Shan-Quan Lan ◽  
Gu-Qiang Li ◽  
Jie-Xiong Mo ◽  
Xiao-Bao Xu
Keyword(s):  
Phase Transition ◽  
Specific Heat ◽  
Topological Charge ◽  
Energy Analysis ◽  
Van Der Waals ◽  
Tail Behavior ◽  
Maxwell Theory ◽  
Free Energy Analysis ◽  
Physical Quantities ◽  
New Phase

The topological charge ϵ of AdS black hole is introduced by Tian et al. in their papers, where a complete thermodynamic first law is obtained. In this paper, we investigate a new phase transition related to the topological charge in Einstein-Maxwell theory. Firstly, we derive the explicit solutions corresponding to the divergence of specific heat Cϵ and determine the phase transition critical point. Secondly, the T-r curve and T-S curve are investigated and they exhibit an interesting van der Waals system’s behavior. Critical physical quantities are also obtained which are consistent with those derived from the specific heat analysis. Thirdly, a van der Waals system’s swallow tail behavior is observed when ϵ>ϵc in the F-T graph. What is more, the analytic phase transition coexistence lines are obtained by using the Maxwell equal area law and free energy analysis, the results of which are consistent with each other.

scholarly journals Investigation of Thermophysical Properties of Three Barrel Steels

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 573 ◽  
Author(s):  
Piotr Koniorczyk ◽  
Janusz Zmywaczyk ◽  
Andrzej Dębski ◽  
Mateusz Zieliński ◽  
Marek Preiskorn ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Diffusivity ◽  
Specific Heat ◽  
Room Temperature ◽  
Light Flash ◽  
Austenite Phase ◽  
Inconel 600 ◽  
Duplex Steel ◽  
Heat Capacity Measurements ◽  
Specialized Measuring

In this paper, thermal diffusivity and heat capacity measurements were performed for three types of barrel steel, 38HMJ (1.8509), 30HN2MFA, and duplex (1.4462). Thermal diffusivity tests as a function of temperature were performed in the range of room temperature (RT) to 500 °C, and specific heat in the range of RT to 1000 °C. All tests were carried out using NETZSCH specialized measuring stands: LFA 467 light flash apparatus and DSC 404 F1 Pegasus differential scanning calorimeter. In the measurements of thermal diffusivity, the reference material Inconel 600 was used. This made it possible to determine thermal conductivity and specific heat as a function of the temperature of barrel steel. The results of specific heat tests of the 38HMJ and the 30HN2MFA steels show a ferrite–austenite phase transition in the 750–810 °C temperature range. This transition was not observed in the duplex steel.

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