On Temperature Dependence of Excess Gibbs Energy

1999 ◽  
Vol 64 (7) ◽  
pp. 1093-1099 ◽  
Author(s):  
Ivona Malijevská ◽  
Anatol Malijevský
Keyword(s):  
Heat Capacity ◽  
Gibbs Energy ◽  
Temperature Dependence ◽  
Excess Gibbs Energy ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Wilson Equation ◽  
Excess Heat ◽  
Energy Excess ◽  
Wilson And Nrtl Equations

Temperature dependence of GE is discussed for three widely used equations linear and nonlinear in parameters. It is shown that the Wilson equation predicts always positive excess heat capacity regardless of values of its parameters. Several temperature modifications of the Redlich-Kister, Wilson and NRTL equations are discussed with respect to the sign of the excess Gibbs energy, excess enthalpy and excess heat capacity.

Temperature dependence of the mixing enthalpy and excess heat capacity in the liquid system nickel-zirconium

1996 ◽  
Vol 17 (4) ◽  
pp. 959-966 ◽  
Author(s):  
M. R�sner-Kuhn ◽  
J. Qin ◽  
K. Schaefers ◽  
U. Thiedemann ◽  
M. G. Frohberg
Keyword(s):  
Heat Capacity ◽  
Temperature Dependence ◽  
Excess Heat Capacity ◽  
Liquid System ◽  
Mixing Enthalpy ◽  
Excess Heat

scholarly journals Теплофизические и диэлектрические свойства Bi-=SUB=-1-x-=/SUB=-Er-=SUB=-x-=/SUB=-FeO-=SUB=-3-=/SUB=-

2018 ◽  
Vol 60 (9) ◽  
pp. 1811
Author(s):  
С.Н. Каллаев ◽  
З.М. Омаров ◽  
А.Р. Билалов ◽  
А.Я. Курбайтаев ◽  
Л.А. Резниченко ◽  
...  
Keyword(s):  
Phase Transition ◽  
Heat Capacity ◽  
Temperature Dependence ◽  
Wide Temperature Range ◽  
Excess Heat Capacity ◽  
Structural Studies ◽  
Excess Heat ◽  
Temperature Range ◽  
Temperature Dependences ◽  
Additional Anomaly

AbstractThe heat capacity and the permittivity of multiferroics Bi_1 – x Er_ x FeO_3 ( x = 0, 0.10, and 0.15) have been studied in the temperature range 130–800 K. It is found that an insignificant substitution of erbium for bismuth significantly increases the heat capacity in a wide temperature range T > 300 K. The temperature dependence of the excess heat capacity is shown to be due to manifestation of the three-level states. An additional anomaly characteristic of a phase transition has been revealed in the temperature dependences of the heat capacity and the permittivity for the compositions with x = 0.15 at T = 587 K. The results of studies are discussed in combination of the data of structural studies.

scholarly journals Simultaneous correlation of the excess enthalpy and W-shaped excess heat capacity of 1, 4-dioxane- n-alkane systems by PRSV-HVOS CEOS

2003 ◽  
Vol 68 (1) ◽  
pp. 35-46 ◽  
Author(s):  
Mirjana Kijevcanin ◽  
A.B. Djordjevic ◽  
Ivona Grguric ◽  
Bojan Djordjevic ◽  
Slobodan Serbanovic
Keyword(s):  
Heat Capacity ◽  
Equation Of State ◽  
Concentration Dependence ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Mixing Rule ◽  
Temperature Dependent ◽  
Excess Heat ◽  
Nrtl Equation

In this work the Peng-Robinson-Stryjek-Vera (PRSV) equation of state coupled with the Huron-Vidal-Orbey-Sandler (HVOS) rule was tested for the correlation of the excess enthalpy (HE) and the excess heat capacity (cp E) alone and simultaneously. The HVOS mixing rule incorporates the NRTL equation as the GE model. All calculations were performed using the linear and reciprocal forms of the temperature dependent parameters of the models. For all the evaluations the 1,4-dioxane+n-alkane systems were chosen having in mind the unusually W-shaped concentration dependence of cp E for these systems. The correlation of the HE and cp E data alone for all the investigated systems using four coefficients and for the simultaneous correlation of HE+cp E data using six coefficients of the temperature dependent parameters of the PRSV-HVOS models could be considered as being very satisfactory.

scholarly journals Excess Heat Capacity in Mo/Au Transition Edge Sensor Bolometric Detectors

2021 ◽  
pp. 1-1
Author(s):  
Ari David Brown ◽  
Regis Brekosky ◽  
Felipe Colazo-Petit ◽  
Matthew Greenhouse ◽  
James Hay-Wehle ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Transition Edge Sensor ◽  
Excess Heat Capacity ◽  
Excess Heat ◽  
Bolometric Detectors ◽  
Transition Edge
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